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Finding the Fourth Proportional to 80,339.28, 120,589.80 and 71,040.48

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Solution

The fourth proportional to 80,339.28, 120,589.80 and 71,040.48 is: 106,632.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,339.28 : 120,589.80 = 71,040.48 : x
  2. Step 2: Convert to fraction form
    80,339.28/120,589.80 = 71,040.48/x
  3. Step 3: Cross multiply
    80,339.28x = 120,589.80 × 71,040.48
  4. Step 4: Simplify right side
    80,339.28x = 8,566,757,275.10
  5. Step 5: Solve for x
    x = 8,566,757,275.10/80,339.28
  6. Step 6: Final answer
    x = 106,632.24

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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.