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Finding the Fourth Proportional to 80,380.65, 120,374.11 and 56,629.83

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Solution

The fourth proportional to 80,380.65, 120,374.11 and 56,629.83 is: 84,806.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,380.65 : 120,374.11 = 56,629.83 : x
  2. Step 2: Convert to fraction form
    80,380.65/120,374.11 = 56,629.83/x
  3. Step 3: Cross multiply
    80,380.65x = 120,374.11 × 56,629.83
  4. Step 4: Simplify right side
    80,380.65x = 6,816,765,385.70
  5. Step 5: Solve for x
    x = 6,816,765,385.70/80,380.65
  6. Step 6: Final answer
    x = 84,806.05

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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.