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Finding the Fourth Proportional to 80,462.61, 120,691.87 and 38,372.45

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Solution

The fourth proportional to 80,462.61, 120,691.87 and 38,372.45 is: 57,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,462.61 : 120,691.87 = 38,372.45 : x
  2. Step 2: Convert to fraction form
    80,462.61/120,691.87 = 38,372.45/x
  3. Step 3: Cross multiply
    80,462.61x = 120,691.87 × 38,372.45
  4. Step 4: Simplify right side
    80,462.61x = 4,631,242,746.98
  5. Step 5: Solve for x
    x = 4,631,242,746.98/80,462.61
  6. Step 6: Final answer
    x = 57,557.70

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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.