Home / 115,418.20-159,176.72-81,366.60

Finding the Fourth Proportional to 115,418.20, 159,176.72 and 81,366.60

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Solution

The fourth proportional to 115,418.20, 159,176.72 and 81,366.60 is: 112,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,418.20 : 159,176.72 = 81,366.60 : x
  2. Step 2: Convert to fraction form
    115,418.20/159,176.72 = 81,366.60/x
  3. Step 3: Cross multiply
    115,418.20x = 159,176.72 × 81,366.60
  4. Step 4: Simplify right side
    115,418.20x = 12,951,668,505.55
  5. Step 5: Solve for x
    x = 12,951,668,505.55/115,418.20
  6. Step 6: Final answer
    x = 112,215.13

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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.