Home / 80,534.04-120,787-21,375.68

Finding the Fourth Proportional to 80,534.04, 120,787 and 21,375.68

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Solution

The fourth proportional to 80,534.04, 120,787 and 21,375.68 is: 32,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,534.04 : 120,787 = 21,375.68 : x
  2. Step 2: Convert to fraction form
    80,534.04/120,787 = 21,375.68/x
  3. Step 3: Cross multiply
    80,534.04x = 120,787 × 21,375.68
  4. Step 4: Simplify right side
    80,534.04x = 2,581,904,260.16
  5. Step 5: Solve for x
    x = 2,581,904,260.16/80,534.04
  6. Step 6: Final answer
    x = 32,059.79

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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.