The age of Jeremy three years from now will be 40+3 = <<40+3=43>>43 years
Since Sebastian age is four years more than Jeremy's, Sebastian is currently 40+4 = 44 years.
In three years, Sebastian will be 44+3 = <<44+3=47>>47 years old
The total age of Jeremy and Sebastian in three years will be 47+43 = <<47+43=90>>90
If the total age of Jeremy, Sebastian and Sophia in three years is 150, then Sophia's age in three years will be 150-90 = <<150-90=60>>60
#### 60