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Finding the Fourth Proportional to 72,628.44, 108,789.46 and 33,218.68

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Solution

The fourth proportional to 72,628.44, 108,789.46 and 33,218.68 is: 49,757.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,628.44 : 108,789.46 = 33,218.68 : x
  2. Step 2: Convert to fraction form
    72,628.44/108,789.46 = 33,218.68/x
  3. Step 3: Cross multiply
    72,628.44x = 108,789.46 × 33,218.68
  4. Step 4: Simplify right side
    72,628.44x = 3,613,842,259.11
  5. Step 5: Solve for x
    x = 3,613,842,259.11/72,628.44
  6. Step 6: Final answer
    x = 49,757.95

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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.