Home / 263,131.05-394,721.18-85,590.39

Finding the Fourth Proportional to 263,131.05, 394,721.18 and 85,590.39

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Solution

The fourth proportional to 263,131.05, 394,721.18 and 85,590.39 is: 128,393.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,131.05 : 394,721.18 = 85,590.39 : x
  2. Step 2: Convert to fraction form
    263,131.05/394,721.18 = 85,590.39/x
  3. Step 3: Cross multiply
    263,131.05x = 394,721.18 × 85,590.39
  4. Step 4: Simplify right side
    263,131.05x = 33,784,339,737.46
  5. Step 5: Solve for x
    x = 33,784,339,737.46/263,131.05
  6. Step 6: Final answer
    x = 128,393.59

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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.