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Finding the Fourth Proportional to 131,992.65, 182,102.13 and 86,695.20

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Solution

The fourth proportional to 131,992.65, 182,102.13 and 86,695.20 is: 119,608.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,992.65 : 182,102.13 = 86,695.20 : x
  2. Step 2: Convert to fraction form
    131,992.65/182,102.13 = 86,695.20/x
  3. Step 3: Cross multiply
    131,992.65x = 182,102.13 × 86,695.20
  4. Step 4: Simplify right side
    131,992.65x = 15,787,380,580.78
  5. Step 5: Solve for x
    x = 15,787,380,580.78/131,992.65
  6. Step 6: Final answer
    x = 119,608.03

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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.