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Finding the Fourth Proportional to 80,940.87, 111,711.96 and 49,130.96

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Solution

The fourth proportional to 80,940.87, 111,711.96 and 49,130.96 is: 67,808.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,940.87 : 111,711.96 = 49,130.96 : x
  2. Step 2: Convert to fraction form
    80,940.87/111,711.96 = 49,130.96/x
  3. Step 3: Cross multiply
    80,940.87x = 111,711.96 × 49,130.96
  4. Step 4: Simplify right side
    80,940.87x = 5,488,515,279.72
  5. Step 5: Solve for x
    x = 5,488,515,279.72/80,940.87
  6. Step 6: Final answer
    x = 67,808.95

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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.