Looping through two lists in parallel - sas

Question

I have the following values
Time Value
3 0.03
6 0.04
9 0.05
12 0.06
As you can see, they move at steps of three and one respectively.
If I want to apply the following formula for each of them
X=sum(X,2/value)
What should I do?
I have tried as follows:
data want;
array my_array{0-10} $ _temporary_;
X=0;
Do i=1 to 5;
My_array(i)=sum(x,2/value)*i;
X= =sum(x,2/value)*i;
End;
Total=X;
Run;
However I am not looping through value, only through time (i goes from 1 to 4).
I would like to calculate for each time X applying the formula above, in order to have one column extra in the table above, then get the sum of these values.
In the example provided by Kermit in the answer below, the expected output (values under x should satisfy the formula mentioned above) would be the following:
time value x sum_x
3 0.03 200
6 0.04 300
9 0.05 360
12 0.06 400

Answer 1

Your expected results do not seem to match your explanation of the formula. You could use two arrays to allow you to pair the TIME and VALUE amounts.
data want;
array t [4] _temporary_ (3 6 9 12);
array v [4] _temporary_ (0.03 0.04 0.05 0.06);
do index=1 to dim(t);
time=t[index];
value=v[index];
x=sum(x,2/value)*index;
output;
end;
run;
Results
Obs index time value x
1 1 3 0.03 66.67
2 2 6 0.04 233.33
3 3 9 0.05 820.00
4 4 12 0.06 3413.33

Answer 2

If I understand correctly, time would be set on a quarterly basis and you would like to get the sum of X for each time. Next time, consider giving the expected output in your question.
data stage1;
do time=3 to 12 by 3;
do value = 0.03, 0.04, 0.05, 0.06;
x=(2/value)*time;
output;
end;
end;
run;
proc sort data=stage1;
by time value;
run;
data want;
do _n_=1 by 1 until(last.time);
set stage1;
by time;
sum_x=sum(sum_x, x);
output;
end;
run;
time value x sum_x
3 0.03 200 200
3 0.04 150 350
3 0.05 120 470
3 0.06 100 570
6 0.03 400 400
6 0.04 300 700
6 0.05 240 940
6 0.06 200 1140
9 0.03 600 600
9 0.04 450 1050
9 0.05 360 1410
9 0.06 300 1710
12 0.03 800 800
12 0.04 600 1400
12 0.05 480 1880
12 0.06 400 2280
EDIT after comments
Why would you use a do loop? Just perform element-wise multiplication within a table.
data want;
set have;
x=(2/value)*time;
retain sum_x 0;
sum_x=sum(sum_x, x);
output;
run;