Home / 258,249.48-387,359.61-80,735.55

Finding the Fourth Proportional to 258,249.48, 387,359.61 and 80,735.55

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Solution

The fourth proportional to 258,249.48, 387,359.61 and 80,735.55 is: 121,098.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,249.48 : 387,359.61 = 80,735.55 : x
  2. Step 2: Convert to fraction form
    258,249.48/387,359.61 = 80,735.55/x
  3. Step 3: Cross multiply
    258,249.48x = 387,359.61 × 80,735.55
  4. Step 4: Simplify right side
    258,249.48x = 31,273,691,161.14
  5. Step 5: Solve for x
    x = 31,273,691,161.14/258,249.48
  6. Step 6: Final answer
    x = 121,098.76

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1.5x scale

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.