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Finding the Fourth Proportional to 80,022.80, 120,034.20 and 71,037.20

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Solution

The fourth proportional to 80,022.80, 120,034.20 and 71,037.20 is: 106,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,022.80 : 120,034.20 = 71,037.20 : x
  2. Step 2: Convert to fraction form
    80,022.80/120,034.20 = 71,037.20/x
  3. Step 3: Cross multiply
    80,022.80x = 120,034.20 × 71,037.20
  4. Step 4: Simplify right side
    80,022.80x = 8,526,893,472.24
  5. Step 5: Solve for x
    x = 8,526,893,472.24/80,022.80
  6. Step 6: Final answer
    x = 106,555.80

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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.