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Finding the Fourth Proportional to 258,553.68, 387,839 and 71,549.52

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Solution

The fourth proportional to 258,553.68, 387,839 and 71,549.52 is: 107,326.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,553.68 : 387,839 = 71,549.52 : x
  2. Step 2: Convert to fraction form
    258,553.68/387,839 = 71,549.52/x
  3. Step 3: Cross multiply
    258,553.68x = 387,839 × 71,549.52
  4. Step 4: Simplify right side
    258,553.68x = 27,749,694,287.28
  5. Step 5: Solve for x
    x = 27,749,694,287.28/258,553.68
  6. Step 6: Final answer
    x = 107,326.63

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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.