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Finding the Fourth Proportional to 81,114.92, 121,691.10 and 34,369.64

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Solution

The fourth proportional to 81,114.92, 121,691.10 and 34,369.64 is: 51,562.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,114.92 : 121,691.10 = 34,369.64 : x
  2. Step 2: Convert to fraction form
    81,114.92/121,691.10 = 34,369.64/x
  3. Step 3: Cross multiply
    81,114.92x = 121,691.10 × 34,369.64
  4. Step 4: Simplify right side
    81,114.92x = 4,182,479,298.20
  5. Step 5: Solve for x
    x = 4,182,479,298.20/81,114.92
  6. Step 6: Final answer
    x = 51,562.39

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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.