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Finding the Third Proportional to 31.50 and 74.53

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Solution

The third proportional to 31.50 and 74.53 is: 176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.50 : 74.53 = 74.53 : x
  2. Step 2: Convert to fraction form
    31.50/74.53 = 74.53/x
  3. Step 3: Cross multiply
    31.50x = 74.53 × 74.53
  4. Step 4: Simplify right side
    31.50x = 5,554.91
  5. Step 5: Solve for x
    x = 5,554.91/31.50
  6. Step 6: Final answer
    x = 176.35

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Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.