Home / 258,049.20-387,073.83-80,571.41

Finding the Fourth Proportional to 258,049.20, 387,073.83 and 80,571.41

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Solution

The fourth proportional to 258,049.20, 387,073.83 and 80,571.41 is: 120,857.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,049.20 : 387,073.83 = 80,571.41 : x
  2. Step 2: Convert to fraction form
    258,049.20/387,073.83 = 80,571.41/x
  3. Step 3: Cross multiply
    258,049.20x = 387,073.83 × 80,571.41
  4. Step 4: Simplify right side
    258,049.20x = 31,187,084,257.20
  5. Step 5: Solve for x
    x = 31,187,084,257.20/258,049.20
  6. Step 6: Final answer
    x = 120,857.12

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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.