Home / 258,629.85-387,944.42-81,150.71

Finding the Fourth Proportional to 258,629.85, 387,944.42 and 81,150.71

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Solution

The fourth proportional to 258,629.85, 387,944.42 and 81,150.71 is: 121,725.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,629.85 : 387,944.42 = 81,150.71 : x
  2. Step 2: Convert to fraction form
    258,629.85/387,944.42 = 81,150.71/x
  3. Step 3: Cross multiply
    258,629.85x = 387,944.42 × 81,150.71
  4. Step 4: Simplify right side
    258,629.85x = 31,481,962,778.06
  5. Step 5: Solve for x
    x = 31,481,962,778.06/258,629.85
  6. Step 6: Final answer
    x = 121,725.94

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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.