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Finding the Fourth Proportional to 71,229.60, 98,265.96 and 42,919.20

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Solution

The fourth proportional to 71,229.60, 98,265.96 and 42,919.20 is: 59,209.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,229.60 : 98,265.96 = 42,919.20 : x
  2. Step 2: Convert to fraction form
    71,229.60/98,265.96 = 42,919.20/x
  3. Step 3: Cross multiply
    71,229.60x = 98,265.96 × 42,919.20
  4. Step 4: Simplify right side
    71,229.60x = 4,217,496,390.43
  5. Step 5: Solve for x
    x = 4,217,496,390.43/71,229.60
  6. Step 6: Final answer
    x = 59,209.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.