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Finding the Fourth Proportional to 146.14, 201.72 and 121.84

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Solution

The fourth proportional to 146.14, 201.72 and 121.84 is: 168.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.14 : 201.72 = 121.84 : x
  2. Step 2: Convert to fraction form
    146.14/201.72 = 121.84/x
  3. Step 3: Cross multiply
    146.14x = 201.72 × 121.84
  4. Step 4: Simplify right side
    146.14x = 24,577.56
  5. Step 5: Solve for x
    x = 24,577.56/146.14
  6. Step 6: Final answer
    x = 168.18

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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.