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Finding the Fourth Proportional to 263,665.67, 395,519.09 and 86,190.62

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Solution

The fourth proportional to 263,665.67, 395,519.09 and 86,190.62 is: 129,292.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,665.67 : 395,519.09 = 86,190.62 : x
  2. Step 2: Convert to fraction form
    263,665.67/395,519.09 = 86,190.62/x
  3. Step 3: Cross multiply
    263,665.67x = 395,519.09 × 86,190.62
  4. Step 4: Simplify right side
    263,665.67x = 34,090,033,180.39
  5. Step 5: Solve for x
    x = 34,090,033,180.39/263,665.67
  6. Step 6: Final answer
    x = 129,292.65

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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.