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Finding the Fourth Proportional to 127,928.54, 191,891.46 and 43,687.74

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Solution

The fourth proportional to 127,928.54, 191,891.46 and 43,687.74 is: 65,531.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,928.54 : 191,891.46 = 43,687.74 : x
  2. Step 2: Convert to fraction form
    127,928.54/191,891.46 = 43,687.74/x
  3. Step 3: Cross multiply
    127,928.54x = 191,891.46 × 43,687.74
  4. Step 4: Simplify right side
    127,928.54x = 8,383,304,212.70
  5. Step 5: Solve for x
    x = 8,383,304,212.70/127,928.54
  6. Step 6: Final answer
    x = 65,531.15

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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.