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Finding the Fourth Proportional to 57,183.90, 78,863.67 and 38,319.90

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Solution

The fourth proportional to 57,183.90, 78,863.67 and 38,319.90 is: 52,847.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,183.90 : 78,863.67 = 38,319.90 : x
  2. Step 2: Convert to fraction form
    57,183.90/78,863.67 = 38,319.90/x
  3. Step 3: Cross multiply
    57,183.90x = 78,863.67 × 38,319.90
  4. Step 4: Simplify right side
    57,183.90x = 3,022,047,948.03
  5. Step 5: Solve for x
    x = 3,022,047,948.03/57,183.90
  6. Step 6: Final answer
    x = 52,847.88

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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.