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Finding the Fourth Proportional to 80,532.80, 120,741.60 and 36,123.20

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Solution

The fourth proportional to 80,532.80, 120,741.60 and 36,123.20 is: 54,158.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,532.80 : 120,741.60 = 36,123.20 : x
  2. Step 2: Convert to fraction form
    80,532.80/120,741.60 = 36,123.20/x
  3. Step 3: Cross multiply
    80,532.80x = 120,741.60 × 36,123.20
  4. Step 4: Simplify right side
    80,532.80x = 4,361,572,965.12
  5. Step 5: Solve for x
    x = 4,361,572,965.12/80,532.80
  6. Step 6: Final answer
    x = 54,158.96

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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.