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Finding the Fourth Proportional to 80,109.20, 120,163.80 and 44,679.80

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Solution

The fourth proportional to 80,109.20, 120,163.80 and 44,679.80 is: 67,019.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,109.20 : 120,163.80 = 44,679.80 : x
  2. Step 2: Convert to fraction form
    80,109.20/120,163.80 = 44,679.80/x
  3. Step 3: Cross multiply
    80,109.20x = 120,163.80 × 44,679.80
  4. Step 4: Simplify right side
    80,109.20x = 5,368,894,551.24
  5. Step 5: Solve for x
    x = 5,368,894,551.24/80,109.20
  6. Step 6: Final answer
    x = 67,019.70

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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.