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Finding the Fourth Proportional to 80,379, 120,545.28 and 27,065.16

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Solution

The fourth proportional to 80,379, 120,545.28 and 27,065.16 is: 40,589.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,379 : 120,545.28 = 27,065.16 : x
  2. Step 2: Convert to fraction form
    80,379/120,545.28 = 27,065.16/x
  3. Step 3: Cross multiply
    80,379x = 120,545.28 × 27,065.16
  4. Step 4: Simplify right side
    80,379x = 3,262,577,290.44
  5. Step 5: Solve for x
    x = 3,262,577,290.44/80,379
  6. Step 6: Final answer
    x = 40,589.92

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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.