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Finding the Fourth Proportional to 180.52, 248.72 and 122.20

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Solution

The fourth proportional to 180.52, 248.72 and 122.20 is: 168.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.52 : 248.72 = 122.20 : x
  2. Step 2: Convert to fraction form
    180.52/248.72 = 122.20/x
  3. Step 3: Cross multiply
    180.52x = 248.72 × 122.20
  4. Step 4: Simplify right side
    180.52x = 30,393.58
  5. Step 5: Solve for x
    x = 30,393.58/180.52
  6. Step 6: Final answer
    x = 168.37

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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.