For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).
36, 60, 100,...

Arithmetic = uses addition
Geometric = uses multiplication

60 - 36 = 24
60 + 24 = 84 (does not give you 100)
Proving this is not Arithmetic

60/36 = 5/3 or 1.66666667
100/60 = 5/3 or 1.66666667

Solution: geometric
Common ratio = 5/3

He gained 60,900 dollars for that land