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Finding the Fourth Proportional to 98,198.73, 135,481.92 and 57,353.47

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Solution

The fourth proportional to 98,198.73, 135,481.92 and 57,353.47 is: 79,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,198.73 : 135,481.92 = 57,353.47 : x
  2. Step 2: Convert to fraction form
    98,198.73/135,481.92 = 57,353.47/x
  3. Step 3: Cross multiply
    98,198.73x = 135,481.92 × 57,353.47
  4. Step 4: Simplify right side
    98,198.73x = 7,770,357,680.48
  5. Step 5: Solve for x
    x = 7,770,357,680.48/98,198.73
  6. Step 6: Final answer
    x = 79,128.90

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1.5x scale

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.