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Finding the Fourth Proportional to 225,456.12, 311,058.90 and 129,949.92

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Solution

The fourth proportional to 225,456.12, 311,058.90 and 129,949.92 is: 179,290.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,456.12 : 311,058.90 = 129,949.92 : x
  2. Step 2: Convert to fraction form
    225,456.12/311,058.90 = 129,949.92/x
  3. Step 3: Cross multiply
    225,456.12x = 311,058.90 × 129,949.92
  4. Step 4: Simplify right side
    225,456.12x = 40,422,079,170.29
  5. Step 5: Solve for x
    x = 40,422,079,170.29/225,456.12
  6. Step 6: Final answer
    x = 179,290.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.