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Finding the Fourth Proportional to 73,138.75, 109,691.72 and 43,565.04

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Solution

The fourth proportional to 73,138.75, 109,691.72 and 43,565.04 is: 65,337.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,138.75 : 109,691.72 = 43,565.04 : x
  2. Step 2: Convert to fraction form
    73,138.75/109,691.72 = 43,565.04/x
  3. Step 3: Cross multiply
    73,138.75x = 109,691.72 × 43,565.04
  4. Step 4: Simplify right side
    73,138.75x = 4,778,724,115.01
  5. Step 5: Solve for x
    x = 4,778,724,115.01/73,138.75
  6. Step 6: Final answer
    x = 65,337.79

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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.