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Finding the Fourth Proportional to 125,179.32, 172,747.55 and 74,217.20

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Solution

The fourth proportional to 125,179.32, 172,747.55 and 74,217.20 is: 102,419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,179.32 : 172,747.55 = 74,217.20 : x
  2. Step 2: Convert to fraction form
    125,179.32/172,747.55 = 74,217.20/x
  3. Step 3: Cross multiply
    125,179.32x = 172,747.55 × 74,217.20
  4. Step 4: Simplify right side
    125,179.32x = 12,820,838,789.67
  5. Step 5: Solve for x
    x = 12,820,838,789.67/125,179.32
  6. Step 6: Final answer
    x = 102,419.78

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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.