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Finding the Fourth Proportional to 83,917.20, 126,021.60 and 44,551.20

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Solution

The fourth proportional to 83,917.20, 126,021.60 and 44,551.20 is: 66,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,917.20 : 126,021.60 = 44,551.20 : x
  2. Step 2: Convert to fraction form
    83,917.20/126,021.60 = 44,551.20/x
  3. Step 3: Cross multiply
    83,917.20x = 126,021.60 × 44,551.20
  4. Step 4: Simplify right side
    83,917.20x = 5,614,413,505.92
  5. Step 5: Solve for x
    x = 5,614,413,505.92/83,917.20
  6. Step 6: Final answer
    x = 66,904.20

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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.