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Finding the Third Proportional to 74 and 113.31

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Solution

The third proportional to 74 and 113.31 is: 173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74 : 113.31 = 113.31 : x
  2. Step 2: Convert to fraction form
    74/113.31 = 113.31/x
  3. Step 3: Cross multiply
    74x = 113.31 × 113.31
  4. Step 4: Simplify right side
    74x = 12,839.72
  5. Step 5: Solve for x
    x = 12,839.72/74
  6. Step 6: Final answer
    x = 173.51

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.