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Finding the Fourth Proportional to 163.27, 244.79 and 86.14

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Solution

The fourth proportional to 163.27, 244.79 and 86.14 is: 129.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.27 : 244.79 = 86.14 : x
  2. Step 2: Convert to fraction form
    163.27/244.79 = 86.14/x
  3. Step 3: Cross multiply
    163.27x = 244.79 × 86.14
  4. Step 4: Simplify right side
    163.27x = 21,086.21
  5. Step 5: Solve for x
    x = 21,086.21/163.27
  6. Step 6: Final answer
    x = 129.15

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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.