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Finding the Fourth Proportional to 80,362.87, 120,532.46 and 21,202.70

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Solution

The fourth proportional to 80,362.87, 120,532.46 and 21,202.70 is: 31,800.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,362.87 : 120,532.46 = 21,202.70 : x
  2. Step 2: Convert to fraction form
    80,362.87/120,532.46 = 21,202.70/x
  3. Step 3: Cross multiply
    80,362.87x = 120,532.46 × 21,202.70
  4. Step 4: Simplify right side
    80,362.87x = 2,555,612,880.97
  5. Step 5: Solve for x
    x = 2,555,612,880.97/80,362.87
  6. Step 6: Final answer
    x = 31,800.92

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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.