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Finding the Fourth Proportional to 79,691.98, 109,959.90 and 49,484.65

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Solution

The fourth proportional to 79,691.98, 109,959.90 and 49,484.65 is: 68,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,691.98 : 109,959.90 = 49,484.65 : x
  2. Step 2: Convert to fraction form
    79,691.98/109,959.90 = 49,484.65/x
  3. Step 3: Cross multiply
    79,691.98x = 109,959.90 × 49,484.65
  4. Step 4: Simplify right side
    79,691.98x = 5,441,327,165.54
  5. Step 5: Solve for x
    x = 5,441,327,165.54/79,691.98
  6. Step 6: Final answer
    x = 68,279.48

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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.