Home / 258,520.27-387,785.27-81,023.35

Finding the Fourth Proportional to 258,520.27, 387,785.27 and 81,023.35

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Solution

The fourth proportional to 258,520.27, 387,785.27 and 81,023.35 is: 121,536.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,520.27 : 387,785.27 = 81,023.35 : x
  2. Step 2: Convert to fraction form
    258,520.27/387,785.27 = 81,023.35/x
  3. Step 3: Cross multiply
    258,520.27x = 387,785.27 × 81,023.35
  4. Step 4: Simplify right side
    258,520.27x = 31,419,661,250.94
  5. Step 5: Solve for x
    x = 31,419,661,250.94/258,520.27
  6. Step 6: Final answer
    x = 121,536.55

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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.