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Finding the Fourth Proportional to 317,909.32, 476,862.76 and 81,251.62

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Solution

The fourth proportional to 317,909.32, 476,862.76 and 81,251.62 is: 121,877.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,909.32 : 476,862.76 = 81,251.62 : x
  2. Step 2: Convert to fraction form
    317,909.32/476,862.76 = 81,251.62/x
  3. Step 3: Cross multiply
    317,909.32x = 476,862.76 × 81,251.62
  4. Step 4: Simplify right side
    317,909.32x = 38,745,870,677.08
  5. Step 5: Solve for x
    x = 38,745,870,677.08/317,909.32
  6. Step 6: Final answer
    x = 121,877.12

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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.