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Finding the Fourth Proportional to 67,183.36, 100,745.86 and 20,425.30

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Solution

The fourth proportional to 67,183.36, 100,745.86 and 20,425.30 is: 30,629.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,183.36 : 100,745.86 = 20,425.30 : x
  2. Step 2: Convert to fraction form
    67,183.36/100,745.86 = 20,425.30/x
  3. Step 3: Cross multiply
    67,183.36x = 100,745.86 × 20,425.30
  4. Step 4: Simplify right side
    67,183.36x = 2,057,764,414.26
  5. Step 5: Solve for x
    x = 2,057,764,414.26/67,183.36
  6. Step 6: Final answer
    x = 30,629.08

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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.