Home / 258,229.28-387,366.23-71,240.78

Finding the Fourth Proportional to 258,229.28, 387,366.23 and 71,240.78

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Solution

The fourth proportional to 258,229.28, 387,366.23 and 71,240.78 is: 106,867.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,229.28 : 387,366.23 = 71,240.78 : x
  2. Step 2: Convert to fraction form
    258,229.28/387,366.23 = 71,240.78/x
  3. Step 3: Cross multiply
    258,229.28x = 387,366.23 × 71,240.78
  4. Step 4: Simplify right side
    258,229.28x = 27,596,270,077.82
  5. Step 5: Solve for x
    x = 27,596,270,077.82/258,229.28
  6. Step 6: Final answer
    x = 106,867.32

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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.