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Finding the Fourth Proportional to 180.10, 248.46 and 121.87

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Solution

The fourth proportional to 180.10, 248.46 and 121.87 is: 168.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.10 : 248.46 = 121.87 : x
  2. Step 2: Convert to fraction form
    180.10/248.46 = 121.87/x
  3. Step 3: Cross multiply
    180.10x = 248.46 × 121.87
  4. Step 4: Simplify right side
    180.10x = 30,279.82
  5. Step 5: Solve for x
    x = 30,279.82/180.10
  6. Step 6: Final answer
    x = 168.13

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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.