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Finding the Fourth Proportional to 67,691.87, 93,439.31 and 39,397.56

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Solution

The fourth proportional to 67,691.87, 93,439.31 and 39,397.56 is: 54,382.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,691.87 : 93,439.31 = 39,397.56 : x
  2. Step 2: Convert to fraction form
    67,691.87/93,439.31 = 39,397.56/x
  3. Step 3: Cross multiply
    67,691.87x = 93,439.31 × 39,397.56
  4. Step 4: Simplify right side
    67,691.87x = 3,681,280,822.08
  5. Step 5: Solve for x
    x = 3,681,280,822.08/67,691.87
  6. Step 6: Final answer
    x = 54,382.91

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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.