Home / 258,540.18-387,816.75-71,553.30

Finding the Fourth Proportional to 258,540.18, 387,816.75 and 71,553.30

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Solution

The fourth proportional to 258,540.18, 387,816.75 and 71,553.30 is: 107,331.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,540.18 : 387,816.75 = 71,553.30 : x
  2. Step 2: Convert to fraction form
    258,540.18/387,816.75 = 71,553.30/x
  3. Step 3: Cross multiply
    258,540.18x = 387,816.75 × 71,553.30
  4. Step 4: Simplify right side
    258,540.18x = 27,749,568,257.78
  5. Step 5: Solve for x
    x = 27,749,568,257.78/258,540.18
  6. Step 6: Final answer
    x = 107,331.74

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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.