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Finding the Fourth Proportional to 182.47, 251.71 and 138.73

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Solution

The fourth proportional to 182.47, 251.71 and 138.73 is: 191.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.47 : 251.71 = 138.73 : x
  2. Step 2: Convert to fraction form
    182.47/251.71 = 138.73/x
  3. Step 3: Cross multiply
    182.47x = 251.71 × 138.73
  4. Step 4: Simplify right side
    182.47x = 34,919.73
  5. Step 5: Solve for x
    x = 34,919.73/182.47
  6. Step 6: Final answer
    x = 191.37

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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.