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Finding the Fourth Proportional to 80,648.80, 120,872.40 and 41,221.60

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Solution

The fourth proportional to 80,648.80, 120,872.40 and 41,221.60 is: 61,780.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,648.80 : 120,872.40 = 41,221.60 : x
  2. Step 2: Convert to fraction form
    80,648.80/120,872.40 = 41,221.60/x
  3. Step 3: Cross multiply
    80,648.80x = 120,872.40 × 41,221.60
  4. Step 4: Simplify right side
    80,648.80x = 4,982,553,723.84
  5. Step 5: Solve for x
    x = 4,982,553,723.84/80,648.80
  6. Step 6: Final answer
    x = 61,780.88

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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.