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Finding the Fourth Proportional to 86,186.61, 129,167.61 and 44,031.17

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Solution

The fourth proportional to 86,186.61, 129,167.61 and 44,031.17 is: 65,989.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,186.61 : 129,167.61 = 44,031.17 : x
  2. Step 2: Convert to fraction form
    86,186.61/129,167.61 = 44,031.17/x
  3. Step 3: Cross multiply
    86,186.61x = 129,167.61 × 44,031.17
  4. Step 4: Simplify right side
    86,186.61x = 5,687,400,348.57
  5. Step 5: Solve for x
    x = 5,687,400,348.57/86,186.61
  6. Step 6: Final answer
    x = 65,989.37

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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.