Based on Division proportional, the amount that Eduarda will receive will be from R $ 47,500.00 (letter b).
Reason calculation
a ratio is formed by the division between two numbers, where we can call it according to the Framework: numerator (number above the trace) and by a denominator (below the trace). :
numerator/denominator
The denominator, to reach a result, has to be different from zero.
The question tells us that Mr. Alfred will share half of his prize for the 3 daughters in a way to age.
First, let's determine the sum of the proportional numbers.
ie:
Som = 21 + 19 + 8 = 48
Now, let's calculate the proportional part that each daughter will receive multiplying the total value by the proportion of the corresponding number.
With this:
Renata = 21/48 * (240,000/2) = 52,500 reais
Eduarda = 19/48 * (240,000/2) = 47,500 reais
Luiza = 8/48 * (240,000/2) = 20,000 reais