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Finding the Fourth Proportional to 180.72, 249.30 and 115.11

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Solution

The fourth proportional to 180.72, 249.30 and 115.11 is: 158.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.72 : 249.30 = 115.11 : x
  2. Step 2: Convert to fraction form
    180.72/249.30 = 115.11/x
  3. Step 3: Cross multiply
    180.72x = 249.30 × 115.11
  4. Step 4: Simplify right side
    180.72x = 28,696.92
  5. Step 5: Solve for x
    x = 28,696.92/180.72
  6. Step 6: Final answer
    x = 158.79

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.