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Finding the Fourth Proportional to 80,608.20, 120,912.30 and 52,614.60

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Solution

The fourth proportional to 80,608.20, 120,912.30 and 52,614.60 is: 78,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,608.20 : 120,912.30 = 52,614.60 : x
  2. Step 2: Convert to fraction form
    80,608.20/120,912.30 = 52,614.60/x
  3. Step 3: Cross multiply
    80,608.20x = 120,912.30 × 52,614.60
  4. Step 4: Simplify right side
    80,608.20x = 6,361,752,299.58
  5. Step 5: Solve for x
    x = 6,361,752,299.58/80,608.20
  6. Step 6: Final answer
    x = 78,921.90

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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.