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Finding the Fourth Proportional to 79,876.76, 119,815.13 and 27,286.70

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Solution

The fourth proportional to 79,876.76, 119,815.13 and 27,286.70 is: 40,930.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,876.76 : 119,815.13 = 27,286.70 : x
  2. Step 2: Convert to fraction form
    79,876.76/119,815.13 = 27,286.70/x
  3. Step 3: Cross multiply
    79,876.76x = 119,815.13 × 27,286.70
  4. Step 4: Simplify right side
    79,876.76x = 3,269,358,976.91
  5. Step 5: Solve for x
    x = 3,269,358,976.91/79,876.76
  6. Step 6: Final answer
    x = 40,930.04

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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.