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Finding the Fourth Proportional to 57,728.70, 86,593.05 and 37,899.90

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Solution

The fourth proportional to 57,728.70, 86,593.05 and 37,899.90 is: 56,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,728.70 : 86,593.05 = 37,899.90 : x
  2. Step 2: Convert to fraction form
    57,728.70/86,593.05 = 37,899.90/x
  3. Step 3: Cross multiply
    57,728.70x = 86,593.05 × 37,899.90
  4. Step 4: Simplify right side
    57,728.70x = 3,281,867,935.70
  5. Step 5: Solve for x
    x = 3,281,867,935.70/57,728.70
  6. Step 6: Final answer
    x = 56,849.85

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Double scale
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Similar ratio
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1.5x scale

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.