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Finding the Fourth Proportional to 167,919.65, 231,728.75 and 91,437.56

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Solution

The fourth proportional to 167,919.65, 231,728.75 and 91,437.56 is: 126,183.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,919.65 : 231,728.75 = 91,437.56 : x
  2. Step 2: Convert to fraction form
    167,919.65/231,728.75 = 91,437.56/x
  3. Step 3: Cross multiply
    167,919.65x = 231,728.75 × 91,437.56
  4. Step 4: Simplify right side
    167,919.65x = 21,188,711,481.85
  5. Step 5: Solve for x
    x = 21,188,711,481.85/167,919.65
  6. Step 6: Final answer
    x = 126,183.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.