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Finding the Fourth Proportional to 134.51, 201.76 and 80.75

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Solution

The fourth proportional to 134.51, 201.76 and 80.75 is: 121.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.51 : 201.76 = 80.75 : x
  2. Step 2: Convert to fraction form
    134.51/201.76 = 80.75/x
  3. Step 3: Cross multiply
    134.51x = 201.76 × 80.75
  4. Step 4: Simplify right side
    134.51x = 16,291.72
  5. Step 5: Solve for x
    x = 16,291.72/134.51
  6. Step 6: Final answer
    x = 121.12

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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.