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Finding the Fourth Proportional to 182.56, 251.68 and 138.88

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Solution

The fourth proportional to 182.56, 251.68 and 138.88 is: 191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.56 : 251.68 = 138.88 : x
  2. Step 2: Convert to fraction form
    182.56/251.68 = 138.88/x
  3. Step 3: Cross multiply
    182.56x = 251.68 × 138.88
  4. Step 4: Simplify right side
    182.56x = 34,953.32
  5. Step 5: Solve for x
    x = 34,953.32/182.56
  6. Step 6: Final answer
    x = 191.46

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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.