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Finding the Fourth Proportional to 163.13, 224.72 and 131.96

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Solution

The fourth proportional to 163.13, 224.72 and 131.96 is: 181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.13 : 224.72 = 131.96 : x
  2. Step 2: Convert to fraction form
    163.13/224.72 = 131.96/x
  3. Step 3: Cross multiply
    163.13x = 224.72 × 131.96
  4. Step 4: Simplify right side
    163.13x = 29,652.27
  5. Step 5: Solve for x
    x = 29,652.27/163.13
  6. Step 6: Final answer
    x = 181.78

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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.