If Masud has 60 siblings, and Carlos has 3/4 times as many siblings as Masud, Carlos has 3/4*60=<<60*3/4=45>>45 siblings.
Four times as many siblings as Masud has is 4*60=<<4*60=240>>240
Janet has 60 less than four times as many siblings as Masud, a total of 240-60=<<240-60=180>>180 siblings.
The number of siblings Janet have more than Carlos is 180-45=<<180-45=135>>135
#### 135