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Finding the Fourth Proportional to 168,609.78, 252,908.67 and 42,251.07

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Solution

The fourth proportional to 168,609.78, 252,908.67 and 42,251.07 is: 63,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,609.78 : 252,908.67 = 42,251.07 : x
  2. Step 2: Convert to fraction form
    168,609.78/252,908.67 = 42,251.07/x
  3. Step 3: Cross multiply
    168,609.78x = 252,908.67 × 42,251.07
  4. Step 4: Simplify right side
    168,609.78x = 10,685,661,919.78
  5. Step 5: Solve for x
    x = 10,685,661,919.78/168,609.78
  6. Step 6: Final answer
    x = 63,375.10

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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.