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Finding the Third Proportional to 68 and 149.38

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Solution

The third proportional to 68 and 149.38 is: 328.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68 : 149.38 = 149.38 : x
  2. Step 2: Convert to fraction form
    68/149.38 = 149.38/x
  3. Step 3: Cross multiply
    68x = 149.38 × 149.38
  4. Step 4: Simplify right side
    68x = 22,312.89
  5. Step 5: Solve for x
    x = 22,312.89/68
  6. Step 6: Final answer
    x = 328.13

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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.