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Finding the Fourth Proportional to 80,251.67, 120,378.11 and 21,087.24

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Solution

The fourth proportional to 80,251.67, 120,378.11 and 21,087.24 is: 31,631.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,251.67 : 120,378.11 = 21,087.24 : x
  2. Step 2: Convert to fraction form
    80,251.67/120,378.11 = 21,087.24/x
  3. Step 3: Cross multiply
    80,251.67x = 120,378.11 × 21,087.24
  4. Step 4: Simplify right side
    80,251.67x = 2,538,441,990.88
  5. Step 5: Solve for x
    x = 2,538,441,990.88/80,251.67
  6. Step 6: Final answer
    x = 31,631.02

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1.5x scale

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.