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Finding the Fourth Proportional to 220,861.80, 331,379.10 and 80,634.60

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Solution

The fourth proportional to 220,861.80, 331,379.10 and 80,634.60 is: 120,983.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,861.80 : 331,379.10 = 80,634.60 : x
  2. Step 2: Convert to fraction form
    220,861.80/331,379.10 = 80,634.60/x
  3. Step 3: Cross multiply
    220,861.80x = 331,379.10 × 80,634.60
  4. Step 4: Simplify right side
    220,861.80x = 26,720,621,176.86
  5. Step 5: Solve for x
    x = 26,720,621,176.86/220,861.80
  6. Step 6: Final answer
    x = 120,983.44

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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.