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Finding the Third Proportional to 51.38 and 74.63

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Solution

The third proportional to 51.38 and 74.63 is: 108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.38 : 74.63 = 74.63 : x
  2. Step 2: Convert to fraction form
    51.38/74.63 = 74.63/x
  3. Step 3: Cross multiply
    51.38x = 74.63 × 74.63
  4. Step 4: Simplify right side
    51.38x = 5,568.89
  5. Step 5: Solve for x
    x = 5,568.89/51.38
  6. Step 6: Final answer
    x = 108.40

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.