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Finding the Fourth Proportional to 206,595.20, 309,819.90 and 73,479.80

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Solution

The fourth proportional to 206,595.20, 309,819.90 and 73,479.80 is: 110,193.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,595.20 : 309,819.90 = 73,479.80 : x
  2. Step 2: Convert to fraction form
    206,595.20/309,819.90 = 73,479.80/x
  3. Step 3: Cross multiply
    206,595.20x = 309,819.90 × 73,479.80
  4. Step 4: Simplify right side
    206,595.20x = 22,765,504,288.02
  5. Step 5: Solve for x
    x = 22,765,504,288.02/206,595.20
  6. Step 6: Final answer
    x = 110,193.77

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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.