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Finding the Fourth Proportional to 262,690.67, 394,091.40 and 85,183.88

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Solution

The fourth proportional to 262,690.67, 394,091.40 and 85,183.88 is: 127,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,690.67 : 394,091.40 = 85,183.88 : x
  2. Step 2: Convert to fraction form
    262,690.67/394,091.40 = 85,183.88/x
  3. Step 3: Cross multiply
    262,690.67x = 394,091.40 × 85,183.88
  4. Step 4: Simplify right side
    262,690.67x = 33,570,233,744.42
  5. Step 5: Solve for x
    x = 33,570,233,744.42/262,690.67
  6. Step 6: Final answer
    x = 127,793.78

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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.