Home / 258,747.90-388,138.32-81,261.92

Finding the Fourth Proportional to 258,747.90, 388,138.32 and 81,261.92

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Solution

The fourth proportional to 258,747.90, 388,138.32 and 81,261.92 is: 121,898.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,747.90 : 388,138.32 = 81,261.92 : x
  2. Step 2: Convert to fraction form
    258,747.90/388,138.32 = 81,261.92/x
  3. Step 3: Cross multiply
    258,747.90x = 388,138.32 × 81,261.92
  4. Step 4: Simplify right side
    258,747.90x = 31,540,863,168.08
  5. Step 5: Solve for x
    x = 31,540,863,168.08/258,747.90
  6. Step 6: Final answer
    x = 121,898.05

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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.