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Finding the Fourth Proportional to 117,691.65, 176,481.86 and 42,759.54

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Solution

The fourth proportional to 117,691.65, 176,481.86 and 42,759.54 is: 64,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,691.65 : 176,481.86 = 42,759.54 : x
  2. Step 2: Convert to fraction form
    117,691.65/176,481.86 = 42,759.54/x
  3. Step 3: Cross multiply
    117,691.65x = 176,481.86 × 42,759.54
  4. Step 4: Simplify right side
    117,691.65x = 7,546,282,938.15
  5. Step 5: Solve for x
    x = 7,546,282,938.15/117,691.65
  6. Step 6: Final answer
    x = 64,119.10

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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.