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Finding the Fourth Proportional to 71,508.79, 98,682.12 and 39,677.92

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Solution

The fourth proportional to 71,508.79, 98,682.12 and 39,677.92 is: 54,755.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,508.79 : 98,682.12 = 39,677.92 : x
  2. Step 2: Convert to fraction form
    71,508.79/98,682.12 = 39,677.92/x
  3. Step 3: Cross multiply
    71,508.79x = 98,682.12 × 39,677.92
  4. Step 4: Simplify right side
    71,508.79x = 3,915,500,769.38
  5. Step 5: Solve for x
    x = 3,915,500,769.38/71,508.79
  6. Step 6: Final answer
    x = 54,755.52

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1.5x scale

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.