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Finding the Fourth Proportional to 80,644.80, 120,909.60 and 36,235.20

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Solution

The fourth proportional to 80,644.80, 120,909.60 and 36,235.20 is: 54,326.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,644.80 : 120,909.60 = 36,235.20 : x
  2. Step 2: Convert to fraction form
    80,644.80/120,909.60 = 36,235.20/x
  3. Step 3: Cross multiply
    80,644.80x = 120,909.60 × 36,235.20
  4. Step 4: Simplify right side
    80,644.80x = 4,381,183,537.92
  5. Step 5: Solve for x
    x = 4,381,183,537.92/80,644.80
  6. Step 6: Final answer
    x = 54,326.92

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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.