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Finding the Fourth Proportional to 80,221.96, 120,332.60 and 20,250.56

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Solution

The fourth proportional to 80,221.96, 120,332.60 and 20,250.56 is: 30,375.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,221.96 : 120,332.60 = 20,250.56 : x
  2. Step 2: Convert to fraction form
    80,221.96/120,332.60 = 20,250.56/x
  3. Step 3: Cross multiply
    80,221.96x = 120,332.60 × 20,250.56
  4. Step 4: Simplify right side
    80,221.96x = 2,436,802,536.26
  5. Step 5: Solve for x
    x = 2,436,802,536.26/80,221.96
  6. Step 6: Final answer
    x = 30,375.75

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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.