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Finding the Fourth Proportional to 263,181.56, 394,731.16 and 85,687.37

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Solution

The fourth proportional to 263,181.56, 394,731.16 and 85,687.37 is: 128,517.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,181.56 : 394,731.16 = 85,687.37 : x
  2. Step 2: Convert to fraction form
    263,181.56/394,731.16 = 85,687.37/x
  3. Step 3: Cross multiply
    263,181.56x = 394,731.16 × 85,687.37
  4. Step 4: Simplify right side
    263,181.56x = 33,823,475,515.84
  5. Step 5: Solve for x
    x = 33,823,475,515.84/263,181.56
  6. Step 6: Final answer
    x = 128,517.65

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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.