Home / 258,654.22-387,958.26-90,145.88

Finding the Fourth Proportional to 258,654.22, 387,958.26 and 90,145.88

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Solution

The fourth proportional to 258,654.22, 387,958.26 and 90,145.88 is: 135,210.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,654.22 : 387,958.26 = 90,145.88 : x
  2. Step 2: Convert to fraction form
    258,654.22/387,958.26 = 90,145.88/x
  3. Step 3: Cross multiply
    258,654.22x = 387,958.26 × 90,145.88
  4. Step 4: Simplify right side
    258,654.22x = 34,972,838,750.97
  5. Step 5: Solve for x
    x = 34,972,838,750.97/258,654.22
  6. Step 6: Final answer
    x = 135,210.78

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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.