Home / 80,344.85-120,534.17-30,423.87

Finding the Fourth Proportional to 80,344.85, 120,534.17 and 30,423.87

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Solution

The fourth proportional to 80,344.85, 120,534.17 and 30,423.87 is: 45,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,344.85 : 120,534.17 = 30,423.87 : x
  2. Step 2: Convert to fraction form
    80,344.85/120,534.17 = 30,423.87/x
  3. Step 3: Cross multiply
    80,344.85x = 120,534.17 × 30,423.87
  4. Step 4: Simplify right side
    80,344.85x = 3,667,115,766.52
  5. Step 5: Solve for x
    x = 3,667,115,766.52/80,344.85
  6. Step 6: Final answer
    x = 45,642.20

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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.