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Finding the Fourth Proportional to 80,612.80, 120,861.60 and 36,203.20

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Solution

The fourth proportional to 80,612.80, 120,861.60 and 36,203.20 is: 54,278.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,612.80 : 120,861.60 = 36,203.20 : x
  2. Step 2: Convert to fraction form
    80,612.80/120,861.60 = 36,203.20/x
  3. Step 3: Cross multiply
    80,612.80x = 120,861.60 × 36,203.20
  4. Step 4: Simplify right side
    80,612.80x = 4,375,576,677.12
  5. Step 5: Solve for x
    x = 4,375,576,677.12/80,612.80
  6. Step 6: Final answer
    x = 54,278.93

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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.