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Finding the Third Proportional to 30.63 and 67.25

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Solution

The third proportional to 30.63 and 67.25 is: 147.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.63 : 67.25 = 67.25 : x
  2. Step 2: Convert to fraction form
    30.63/67.25 = 67.25/x
  3. Step 3: Cross multiply
    30.63x = 67.25 × 67.25
  4. Step 4: Simplify right side
    30.63x = 4,522.56
  5. Step 5: Solve for x
    x = 4,522.56/30.63
  6. Step 6: Final answer
    x = 147.68

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.