list manipulation – Calculation of the ascending point

How to calculate the increasing point between the sum of the total points of increase and the first point.

For example, I have the first number of 1000 and I have 37 points until the last one.
The sum of all points should be 107300.

So I have to know what number I have to add to each growing point.


1st increasing point: 1000 + 100 = 1100
2nd increasing point: 1100 + 100 = 1200
37th point of increase: = 4600 + 100 = 4700

I need to know how to calculate this increasing number 100 because I only know that the sum of all points is 107300 and the first point is 1000.

Sorry if bad explanation or english 🙂