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Finding the Fourth Proportional to 134.59, 201.49 and 115.21

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Solution

The fourth proportional to 134.59, 201.49 and 115.21 is: 172.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.59 : 201.49 = 115.21 : x
  2. Step 2: Convert to fraction form
    134.59/201.49 = 115.21/x
  3. Step 3: Cross multiply
    134.59x = 201.49 × 115.21
  4. Step 4: Simplify right side
    134.59x = 23,213.66
  5. Step 5: Solve for x
    x = 23,213.66/134.59
  6. Step 6: Final answer
    x = 172.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.