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Finding the Fourth Proportional to 89,249.40, 133,614.90 and 86,657.40

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Solution

The fourth proportional to 89,249.40, 133,614.90 and 86,657.40 is: 129,734.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,249.40 : 133,614.90 = 86,657.40 : x
  2. Step 2: Convert to fraction form
    89,249.40/133,614.90 = 86,657.40/x
  3. Step 3: Cross multiply
    89,249.40x = 133,614.90 × 86,657.40
  4. Step 4: Simplify right side
    89,249.40x = 11,578,719,835.26
  5. Step 5: Solve for x
    x = 11,578,719,835.26/89,249.40
  6. Step 6: Final answer
    x = 129,734.43

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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.