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Finding the Fourth Proportional to 206,979.70, 309,850.71 and 126,765.07

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Solution

The fourth proportional to 206,979.70, 309,850.71 and 126,765.07 is: 189,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,979.70 : 309,850.71 = 126,765.07 : x
  2. Step 2: Convert to fraction form
    206,979.70/309,850.71 = 126,765.07/x
  3. Step 3: Cross multiply
    206,979.70x = 309,850.71 × 126,765.07
  4. Step 4: Simplify right side
    206,979.70x = 39,278,246,942.70
  5. Step 5: Solve for x
    x = 39,278,246,942.70/206,979.70
  6. Step 6: Final answer
    x = 189,768.60

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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.