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Finding the Fourth Proportional to 80,532.80, 120,896.40 and 79,949.60

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Solution

The fourth proportional to 80,532.80, 120,896.40 and 79,949.60 is: 120,020.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,532.80 : 120,896.40 = 79,949.60 : x
  2. Step 2: Convert to fraction form
    80,532.80/120,896.40 = 79,949.60/x
  3. Step 3: Cross multiply
    80,532.80x = 120,896.40 × 79,949.60
  4. Step 4: Simplify right side
    80,532.80x = 9,665,618,821.44
  5. Step 5: Solve for x
    x = 9,665,618,821.44/80,532.80
  6. Step 6: Final answer
    x = 120,020.90

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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.