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Finding the Third Proportional to 31.53 and 66.44

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Solution

The third proportional to 31.53 and 66.44 is: 139.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.53 : 66.44 = 66.44 : x
  2. Step 2: Convert to fraction form
    31.53/66.44 = 66.44/x
  3. Step 3: Cross multiply
    31.53x = 66.44 × 66.44
  4. Step 4: Simplify right side
    31.53x = 4,413.94
  5. Step 5: Solve for x
    x = 4,413.94/31.53
  6. Step 6: Final answer
    x = 139.99

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.