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Finding the Fourth Proportional to 135,959.03, 187,650.17 and 86,869.11

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Solution

The fourth proportional to 135,959.03, 187,650.17 and 86,869.11 is: 119,896.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,959.03 : 187,650.17 = 86,869.11 : x
  2. Step 2: Convert to fraction form
    135,959.03/187,650.17 = 86,869.11/x
  3. Step 3: Cross multiply
    135,959.03x = 187,650.17 × 86,869.11
  4. Step 4: Simplify right side
    135,959.03x = 16,301,002,824.90
  5. Step 5: Solve for x
    x = 16,301,002,824.90/135,959.03
  6. Step 6: Final answer
    x = 119,896.44

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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.