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Finding the Fourth Proportional to 135,957.53, 187,648.10 and 86,867.61

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Solution

The fourth proportional to 135,957.53, 187,648.10 and 86,867.61 is: 119,894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,957.53 : 187,648.10 = 86,867.61 : x
  2. Step 2: Convert to fraction form
    135,957.53/187,648.10 = 86,867.61/x
  3. Step 3: Cross multiply
    135,957.53x = 187,648.10 × 86,867.61
  4. Step 4: Simplify right side
    135,957.53x = 16,300,541,533.70
  5. Step 5: Solve for x
    x = 16,300,541,533.70/135,957.53
  6. Step 6: Final answer
    x = 119,894.37

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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.