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Finding the Fourth Proportional to 67,691.68, 93,439.05 and 39,397.37

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Solution

The fourth proportional to 67,691.68, 93,439.05 and 39,397.37 is: 54,382.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,691.68 : 93,439.05 = 39,397.37 : x
  2. Step 2: Convert to fraction form
    67,691.68/93,439.05 = 39,397.37/x
  3. Step 3: Cross multiply
    67,691.68x = 93,439.05 × 39,397.37
  4. Step 4: Simplify right side
    67,691.68x = 3,681,252,431.97
  5. Step 5: Solve for x
    x = 3,681,252,431.97/67,691.68
  6. Step 6: Final answer
    x = 54,382.64

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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.