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Finding the Fourth Proportional to 127,911.12, 191,884.17 and 43,648.62

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Solution

The fourth proportional to 127,911.12, 191,884.17 and 43,648.62 is: 65,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,911.12 : 191,884.17 = 43,648.62 : x
  2. Step 2: Convert to fraction form
    127,911.12/191,884.17 = 43,648.62/x
  3. Step 3: Cross multiply
    127,911.12x = 191,884.17 × 43,648.62
  4. Step 4: Simplify right side
    127,911.12x = 8,375,479,220.35
  5. Step 5: Solve for x
    x = 8,375,479,220.35/127,911.12
  6. Step 6: Final answer
    x = 65,478.90

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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.