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Finding the Fourth Proportional to 261,651.94, 392,481.55 and 74,663.44

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Solution

The fourth proportional to 261,651.94, 392,481.55 and 74,663.44 is: 111,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,651.94 : 392,481.55 = 74,663.44 : x
  2. Step 2: Convert to fraction form
    261,651.94/392,481.55 = 74,663.44/x
  3. Step 3: Cross multiply
    261,651.94x = 392,481.55 × 74,663.44
  4. Step 4: Simplify right side
    261,651.94x = 29,304,021,771.66
  5. Step 5: Solve for x
    x = 29,304,021,771.66/261,651.94
  6. Step 6: Final answer
    x = 111,996.20

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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.