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Finding the Fourth Proportional to 141.28, 213.15 and 134.56

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Solution

The fourth proportional to 141.28, 213.15 and 134.56 is: 203.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.28 : 213.15 = 134.56 : x
  2. Step 2: Convert to fraction form
    141.28/213.15 = 134.56/x
  3. Step 3: Cross multiply
    141.28x = 213.15 × 134.56
  4. Step 4: Simplify right side
    141.28x = 28,681.46
  5. Step 5: Solve for x
    x = 28,681.46/141.28
  6. Step 6: Final answer
    x = 203.01

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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.