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Finding the Fourth Proportional to 141.40, 213.18 and 133.56

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Solution

The fourth proportional to 141.40, 213.18 and 133.56 is: 201.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.40 : 213.18 = 133.56 : x
  2. Step 2: Convert to fraction form
    141.40/213.18 = 133.56/x
  3. Step 3: Cross multiply
    141.40x = 213.18 × 133.56
  4. Step 4: Simplify right side
    141.40x = 28,472.32
  5. Step 5: Solve for x
    x = 28,472.32/141.40
  6. Step 6: Final answer
    x = 201.36

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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.