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Finding the Fourth Proportional to 180.53, 249.24 and 128.18

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Solution

The fourth proportional to 180.53, 249.24 and 128.18 is: 176.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.53 : 249.24 = 128.18 : x
  2. Step 2: Convert to fraction form
    180.53/249.24 = 128.18/x
  3. Step 3: Cross multiply
    180.53x = 249.24 × 128.18
  4. Step 4: Simplify right side
    180.53x = 31,948.69
  5. Step 5: Solve for x
    x = 31,948.69/180.53
  6. Step 6: Final answer
    x = 176.97

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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.