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Finding the Fourth Proportional to 80,452.80, 120,736.80 and 45,355.20

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Solution

The fourth proportional to 80,452.80, 120,736.80 and 45,355.20 is: 68,065.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,452.80 : 120,736.80 = 45,355.20 : x
  2. Step 2: Convert to fraction form
    80,452.80/120,736.80 = 45,355.20/x
  3. Step 3: Cross multiply
    80,452.80x = 120,736.80 × 45,355.20
  4. Step 4: Simplify right side
    80,452.80x = 5,476,041,711.36
  5. Step 5: Solve for x
    x = 5,476,041,711.36/80,452.80
  6. Step 6: Final answer
    x = 68,065.27

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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.