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Finding the Fourth Proportional to 80,862.80, 121,294.20 and 61,179.80

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Solution

The fourth proportional to 80,862.80, 121,294.20 and 61,179.80 is: 91,769.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862.80 : 121,294.20 = 61,179.80 : x
  2. Step 2: Convert to fraction form
    80,862.80/121,294.20 = 61,179.80/x
  3. Step 3: Cross multiply
    80,862.80x = 121,294.20 × 61,179.80
  4. Step 4: Simplify right side
    80,862.80x = 7,420,754,897.16
  5. Step 5: Solve for x
    x = 7,420,754,897.16/80,862.80
  6. Step 6: Final answer
    x = 91,769.70

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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.