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Finding the Fourth Proportional to 80,862.80, 121,294.20 and 74,957.90

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Solution

The fourth proportional to 80,862.80, 121,294.20 and 74,957.90 is: 112,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862.80 : 121,294.20 = 74,957.90 : x
  2. Step 2: Convert to fraction form
    80,862.80/121,294.20 = 74,957.90/x
  3. Step 3: Cross multiply
    80,862.80x = 121,294.20 × 74,957.90
  4. Step 4: Simplify right side
    80,862.80x = 9,091,958,514.18
  5. Step 5: Solve for x
    x = 9,091,958,514.18/80,862.80
  6. Step 6: Final answer
    x = 112,436.85

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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.