Home / 258,717.38-388,076.09-71,728.88

Finding the Fourth Proportional to 258,717.38, 388,076.09 and 71,728.88

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Solution

The fourth proportional to 258,717.38, 388,076.09 and 71,728.88 is: 107,593.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,717.38 : 388,076.09 = 71,728.88 : x
  2. Step 2: Convert to fraction form
    258,717.38/388,076.09 = 71,728.88/x
  3. Step 3: Cross multiply
    258,717.38x = 388,076.09 × 71,728.88
  4. Step 4: Simplify right side
    258,717.38x = 27,836,260,991.45
  5. Step 5: Solve for x
    x = 27,836,260,991.45/258,717.38
  6. Step 6: Final answer
    x = 107,593.32

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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.