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Finding the Third Proportional to 134.81 and 155.16

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Solution

The third proportional to 134.81 and 155.16 is: 178.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.81 : 155.16 = 155.16 : x
  2. Step 2: Convert to fraction form
    134.81/155.16 = 155.16/x
  3. Step 3: Cross multiply
    134.81x = 155.16 × 155.16
  4. Step 4: Simplify right side
    134.81x = 24,073.46
  5. Step 5: Solve for x
    x = 24,073.46/134.81
  6. Step 6: Final answer
    x = 178.57

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.