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Finding the Fourth Proportional to 263,231.45, 394,847.18 and 85,738.45

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Solution

The fourth proportional to 263,231.45, 394,847.18 and 85,738.45 is: 128,607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,231.45 : 394,847.18 = 85,738.45 : x
  2. Step 2: Convert to fraction form
    263,231.45/394,847.18 = 85,738.45/x
  3. Step 3: Cross multiply
    263,231.45x = 394,847.18 × 85,738.45
  4. Step 4: Simplify right side
    263,231.45x = 33,853,585,087.26
  5. Step 5: Solve for x
    x = 33,853,585,087.26/263,231.45
  6. Step 6: Final answer
    x = 128,607.68

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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.