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Finding the Third Proportional to 30.88 and 67.06

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Solution

The third proportional to 30.88 and 67.06 is: 145.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.88 : 67.06 = 67.06 : x
  2. Step 2: Convert to fraction form
    30.88/67.06 = 67.06/x
  3. Step 3: Cross multiply
    30.88x = 67.06 × 67.06
  4. Step 4: Simplify right side
    30.88x = 4,497.38
  5. Step 5: Solve for x
    x = 4,497.38/30.88
  6. Step 6: Final answer
    x = 145.66

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.