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Finding the Fourth Proportional to 79,691.74, 109,949.90 and 45,230.85

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Solution

The fourth proportional to 79,691.74, 109,949.90 and 45,230.85 is: 62,404.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,691.74 : 109,949.90 = 45,230.85 : x
  2. Step 2: Convert to fraction form
    79,691.74/109,949.90 = 45,230.85/x
  3. Step 3: Cross multiply
    79,691.74x = 109,949.90 × 45,230.85
  4. Step 4: Simplify right side
    79,691.74x = 4,973,127,434.42
  5. Step 5: Solve for x
    x = 4,973,127,434.42/79,691.74
  6. Step 6: Final answer
    x = 62,404.55

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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.