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Finding the Fourth Proportional to 125,359.92, 187,565.22 and 77,339.88

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Solution

The fourth proportional to 125,359.92, 187,565.22 and 77,339.88 is: 115,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,359.92 : 187,565.22 = 77,339.88 : x
  2. Step 2: Convert to fraction form
    125,359.92/187,565.22 = 77,339.88/x
  3. Step 3: Cross multiply
    125,359.92x = 187,565.22 × 77,339.88
  4. Step 4: Simplify right side
    125,359.92x = 14,506,271,606.97
  5. Step 5: Solve for x
    x = 14,506,271,606.97/125,359.92
  6. Step 6: Final answer
    x = 115,716.98

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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.