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Finding the Fourth Proportional to 88,691.10, 133,036.65 and 82,815.90

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Solution

The fourth proportional to 88,691.10, 133,036.65 and 82,815.90 is: 124,223.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,691.10 : 133,036.65 = 82,815.90 : x
  2. Step 2: Convert to fraction form
    88,691.10/133,036.65 = 82,815.90/x
  3. Step 3: Cross multiply
    88,691.10x = 133,036.65 × 82,815.90
  4. Step 4: Simplify right side
    88,691.10x = 11,017,549,902.74
  5. Step 5: Solve for x
    x = 11,017,549,902.74/88,691.10
  6. Step 6: Final answer
    x = 124,223.85

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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.