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Finding the Fourth Proportional to 206,600.20, 309,900.30 and 143,614.60

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Solution

The fourth proportional to 206,600.20, 309,900.30 and 143,614.60 is: 215,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,600.20 : 309,900.30 = 143,614.60 : x
  2. Step 2: Convert to fraction form
    206,600.20/309,900.30 = 143,614.60/x
  3. Step 3: Cross multiply
    206,600.20x = 309,900.30 × 143,614.60
  4. Step 4: Simplify right side
    206,600.20x = 44,506,207,624.38
  5. Step 5: Solve for x
    x = 44,506,207,624.38/206,600.20
  6. Step 6: Final answer
    x = 215,421.90

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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.