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Finding the Fourth Proportional to 115,871.40, 173,936.70 and 108,257.40

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Solution

The fourth proportional to 115,871.40, 173,936.70 and 108,257.40 is: 162,507.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,871.40 : 173,936.70 = 108,257.40 : x
  2. Step 2: Convert to fraction form
    115,871.40/173,936.70 = 108,257.40/x
  3. Step 3: Cross multiply
    115,871.40x = 173,936.70 × 108,257.40
  4. Step 4: Simplify right side
    115,871.40x = 18,829,934,906.58
  5. Step 5: Solve for x
    x = 18,829,934,906.58/115,871.40
  6. Step 6: Final answer
    x = 162,507.18

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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.