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Finding the Fourth Proportional to 163.92, 225.96 and 131.04

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Solution

The fourth proportional to 163.92, 225.96 and 131.04 is: 180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.92 : 225.96 = 131.04 : x
  2. Step 2: Convert to fraction form
    163.92/225.96 = 131.04/x
  3. Step 3: Cross multiply
    163.92x = 225.96 × 131.04
  4. Step 4: Simplify right side
    163.92x = 29,609.80
  5. Step 5: Solve for x
    x = 29,609.80/163.92
  6. Step 6: Final answer
    x = 180.64

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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.