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Finding the Third Proportional to 67.44 and 145.81

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Solution

The third proportional to 67.44 and 145.81 is: 315.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.44 : 145.81 = 145.81 : x
  2. Step 2: Convert to fraction form
    67.44/145.81 = 145.81/x
  3. Step 3: Cross multiply
    67.44x = 145.81 × 145.81
  4. Step 4: Simplify right side
    67.44x = 21,261.29
  5. Step 5: Solve for x
    x = 21,261.29/67.44
  6. Step 6: Final answer
    x = 315.27

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.