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Finding the Fourth Proportional to 80,642.96, 120,967.17 and 28,052.90

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Solution

The fourth proportional to 80,642.96, 120,967.17 and 28,052.90 is: 42,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642.96 : 120,967.17 = 28,052.90 : x
  2. Step 2: Convert to fraction form
    80,642.96/120,967.17 = 28,052.90/x
  3. Step 3: Cross multiply
    80,642.96x = 120,967.17 × 28,052.90
  4. Step 4: Simplify right side
    80,642.96x = 3,393,479,923.29
  5. Step 5: Solve for x
    x = 3,393,479,923.29/80,642.96
  6. Step 6: Final answer
    x = 42,080.30

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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.