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Finding the Fourth Proportional to 180.87, 249.60 and 102.20

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Solution

The fourth proportional to 180.87, 249.60 and 102.20 is: 141.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.87 : 249.60 = 102.20 : x
  2. Step 2: Convert to fraction form
    180.87/249.60 = 102.20/x
  3. Step 3: Cross multiply
    180.87x = 249.60 × 102.20
  4. Step 4: Simplify right side
    180.87x = 25,507.68
  5. Step 5: Solve for x
    x = 25,507.68/180.87
  6. Step 6: Final answer
    x = 141.03

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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.