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Finding the Fourth Proportional to 80,571.28, 120,815.42 and 36,159.96

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Solution

The fourth proportional to 80,571.28, 120,815.42 and 36,159.96 is: 54,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,571.28 : 120,815.42 = 36,159.96 : x
  2. Step 2: Convert to fraction form
    80,571.28/120,815.42 = 36,159.96/x
  3. Step 3: Cross multiply
    80,571.28x = 120,815.42 × 36,159.96
  4. Step 4: Simplify right side
    80,571.28x = 4,368,680,754.58
  5. Step 5: Solve for x
    x = 4,368,680,754.58/80,571.28
  6. Step 6: Final answer
    x = 54,221.32

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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.