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Finding the Fourth Proportional to 66,517.60, 99,630.60 and 57,769.60

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Solution

The fourth proportional to 66,517.60, 99,630.60 and 57,769.60 is: 86,527.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,517.60 : 99,630.60 = 57,769.60 : x
  2. Step 2: Convert to fraction form
    66,517.60/99,630.60 = 57,769.60/x
  3. Step 3: Cross multiply
    66,517.60x = 99,630.60 × 57,769.60
  4. Step 4: Simplify right side
    66,517.60x = 5,755,619,909.76
  5. Step 5: Solve for x
    x = 5,755,619,909.76/66,517.60
  6. Step 6: Final answer
    x = 86,527.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.