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Finding the Fourth Proportional to 220,891.90, 331,337.85 and 115,697.20

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Solution

The fourth proportional to 220,891.90, 331,337.85 and 115,697.20 is: 173,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,891.90 : 331,337.85 = 115,697.20 : x
  2. Step 2: Convert to fraction form
    220,891.90/331,337.85 = 115,697.20/x
  3. Step 3: Cross multiply
    220,891.90x = 331,337.85 × 115,697.20
  4. Step 4: Simplify right side
    220,891.90x = 38,334,861,499.02
  5. Step 5: Solve for x
    x = 38,334,861,499.02/220,891.90
  6. Step 6: Final answer
    x = 173,545.80

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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.