Since the number of oranges that Martin has now is twice the number of limes, there are 50/2 = <<50/2=25>>25 limes.
The number of fruits she has now is 50 oranges+25 limes= <<50+25=75>>75
If she had eaten half of the number of fruits that she had, initially Martin had 2*75 = <<2*75=150>>150 fruits
#### 150