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Finding the Fourth Proportional to 125,251.72, 172,843.78 and 71,535.62

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Solution

The fourth proportional to 125,251.72, 172,843.78 and 71,535.62 is: 98,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,251.72 : 172,843.78 = 71,535.62 : x
  2. Step 2: Convert to fraction form
    125,251.72/172,843.78 = 71,535.62/x
  3. Step 3: Cross multiply
    125,251.72x = 172,843.78 × 71,535.62
  4. Step 4: Simplify right side
    125,251.72x = 12,364,486,965.44
  5. Step 5: Solve for x
    x = 12,364,486,965.44/125,251.72
  6. Step 6: Final answer
    x = 98,717.10

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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.