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Finding the Fourth Proportional to 125,306.56, 172,921.44 and 71,591.16

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Solution

The fourth proportional to 125,306.56, 172,921.44 and 71,591.16 is: 98,794.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,306.56 : 172,921.44 = 71,591.16 : x
  2. Step 2: Convert to fraction form
    125,306.56/172,921.44 = 71,591.16/x
  3. Step 3: Cross multiply
    125,306.56x = 172,921.44 × 71,591.16
  4. Step 4: Simplify right side
    125,306.56x = 12,379,646,478.47
  5. Step 5: Solve for x
    x = 12,379,646,478.47/125,306.56
  6. Step 6: Final answer
    x = 98,794.88

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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.