Short Answer: 226
Comment
This looks like the gas law Pressure * Volume = k
For example
P=140
V = 100
V1 = 90
P1 = x
PV = P1 * V1
149 * 100 = 14000
14000 = 90 V1
V1 = 14000/90
V1 = 155.60
Solution for 62
You could do it by solving for K (which is 14000), but it just as easy to solve it by a four part equation.
PV = P1*V1
P = 140
V = 100
P1 = ??? = x
V1 = 62
140 * 100 = 62*x
14000 = 62 x
x = 14000/62
x = 226
