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Finding the Fourth Proportional to 125,616.78, 173,380.95 and 71,932.61

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Solution

The fourth proportional to 125,616.78, 173,380.95 and 71,932.61 is: 99,284.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,616.78 : 173,380.95 = 71,932.61 : x
  2. Step 2: Convert to fraction form
    125,616.78/173,380.95 = 71,932.61/x
  3. Step 3: Cross multiply
    125,616.78x = 173,380.95 × 71,932.61
  4. Step 4: Simplify right side
    125,616.78x = 12,471,744,257.78
  5. Step 5: Solve for x
    x = 12,471,744,257.78/125,616.78
  6. Step 6: Final answer
    x = 99,284.06

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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.