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Finding the Fourth Proportional to 146.21, 220.24 and 133.76

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Solution

The fourth proportional to 146.21, 220.24 and 133.76 is: 201.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.21 : 220.24 = 133.76 : x
  2. Step 2: Convert to fraction form
    146.21/220.24 = 133.76/x
  3. Step 3: Cross multiply
    146.21x = 220.24 × 133.76
  4. Step 4: Simplify right side
    146.21x = 29,458.75
  5. Step 5: Solve for x
    x = 29,458.75/146.21
  6. Step 6: Final answer
    x = 201.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.