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Finding the Fourth Proportional to 182.12, 251.34 and 123.80

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Solution

The fourth proportional to 182.12, 251.34 and 123.80 is: 170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.12 : 251.34 = 123.80 : x
  2. Step 2: Convert to fraction form
    182.12/251.34 = 123.80/x
  3. Step 3: Cross multiply
    182.12x = 251.34 × 123.80
  4. Step 4: Simplify right side
    182.12x = 31,115.89
  5. Step 5: Solve for x
    x = 31,115.89/182.12
  6. Step 6: Final answer
    x = 170.85

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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.