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Finding the Fourth Proportional to 182.72, 252.20 and 117.28

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Solution

The fourth proportional to 182.72, 252.20 and 117.28 is: 161.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.72 : 252.20 = 117.28 : x
  2. Step 2: Convert to fraction form
    182.72/252.20 = 117.28/x
  3. Step 3: Cross multiply
    182.72x = 252.20 × 117.28
  4. Step 4: Simplify right side
    182.72x = 29,578.02
  5. Step 5: Solve for x
    x = 29,578.02/182.72
  6. Step 6: Final answer
    x = 161.88

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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.