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Finding the Fourth Proportional to 180.48, 249.09 and 102.87

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Solution

The fourth proportional to 180.48, 249.09 and 102.87 is: 141.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.48 : 249.09 = 102.87 : x
  2. Step 2: Convert to fraction form
    180.48/249.09 = 102.87/x
  3. Step 3: Cross multiply
    180.48x = 249.09 × 102.87
  4. Step 4: Simplify right side
    180.48x = 25,623.89
  5. Step 5: Solve for x
    x = 25,623.89/180.48
  6. Step 6: Final answer
    x = 141.98

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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.