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Finding the Fourth Proportional to 182.20, 251.48 and 123.20

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Solution

The fourth proportional to 182.20, 251.48 and 123.20 is: 170.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.20 : 251.48 = 123.20 : x
  2. Step 2: Convert to fraction form
    182.20/251.48 = 123.20/x
  3. Step 3: Cross multiply
    182.20x = 251.48 × 123.20
  4. Step 4: Simplify right side
    182.20x = 30,981.72
  5. Step 5: Solve for x
    x = 30,981.72/182.20
  6. Step 6: Final answer
    x = 170.05

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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.