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Finding the Fourth Proportional to 80,680, 111,338.40 and 45,352

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Solution

The fourth proportional to 80,680, 111,338.40 and 45,352 is: 62,585.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,680 : 111,338.40 = 45,352 : x
  2. Step 2: Convert to fraction form
    80,680/111,338.40 = 45,352/x
  3. Step 3: Cross multiply
    80,680x = 111,338.40 × 45,352
  4. Step 4: Simplify right side
    80,680x = 5,049,419,116.80
  5. Step 5: Solve for x
    x = 5,049,419,116.80/80,680
  6. Step 6: Final answer
    x = 62,585.76

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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.