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Finding the Fourth Proportional to 80,449.20, 120,868.20 and 71,895.60

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Solution

The fourth proportional to 80,449.20, 120,868.20 and 71,895.60 is: 108,017.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,449.20 : 120,868.20 = 71,895.60 : x
  2. Step 2: Convert to fraction form
    80,449.20/120,868.20 = 71,895.60/x
  3. Step 3: Cross multiply
    80,449.20x = 120,868.20 × 71,895.60
  4. Step 4: Simplify right side
    80,449.20x = 8,689,891,759.92
  5. Step 5: Solve for x
    x = 8,689,891,759.92/80,449.20
  6. Step 6: Final answer
    x = 108,017.13

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1.5x scale

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.