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Finding the Fourth Proportional to 263,103.39, 394,659.95 and 85,609.71

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Solution

The fourth proportional to 263,103.39, 394,659.95 and 85,609.71 is: 128,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,103.39 : 394,659.95 = 85,609.71 : x
  2. Step 2: Convert to fraction form
    263,103.39/394,659.95 = 85,609.71/x
  3. Step 3: Cross multiply
    263,103.39x = 394,659.95 × 85,609.71
  4. Step 4: Simplify right side
    263,103.39x = 33,786,723,440.07
  5. Step 5: Solve for x
    x = 33,786,723,440.07/263,103.39
  6. Step 6: Final answer
    x = 128,416.15

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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.