Home / 258,306.09-387,250.14-80,721.69

Finding the Fourth Proportional to 258,306.09, 387,250.14 and 80,721.69

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Solution

The fourth proportional to 258,306.09, 387,250.14 and 80,721.69 is: 121,017.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,306.09 : 387,250.14 = 80,721.69 : x
  2. Step 2: Convert to fraction form
    258,306.09/387,250.14 = 80,721.69/x
  3. Step 3: Cross multiply
    258,306.09x = 387,250.14 × 80,721.69
  4. Step 4: Simplify right side
    258,306.09x = 31,259,485,753.54
  5. Step 5: Solve for x
    x = 31,259,485,753.54/258,306.09
  6. Step 6: Final answer
    x = 121,017.22

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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.