Home / 258,186.37-387,279.85-80,694.31

Finding the Fourth Proportional to 258,186.37, 387,279.85 and 80,694.31

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Solution

The fourth proportional to 258,186.37, 387,279.85 and 80,694.31 is: 121,041.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,186.37 : 387,279.85 = 80,694.31 : x
  2. Step 2: Convert to fraction form
    258,186.37/387,279.85 = 80,694.31/x
  3. Step 3: Cross multiply
    258,186.37x = 387,279.85 × 80,694.31
  4. Step 4: Simplify right side
    258,186.37x = 31,251,280,272.65
  5. Step 5: Solve for x
    x = 31,251,280,272.65/258,186.37
  6. Step 6: Final answer
    x = 121,041.56

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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.