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Finding the Third Proportional to 31.83 and 66.23

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Solution

The third proportional to 31.83 and 66.23 is: 137.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.83 : 66.23 = 66.23 : x
  2. Step 2: Convert to fraction form
    31.83/66.23 = 66.23/x
  3. Step 3: Cross multiply
    31.83x = 66.23 × 66.23
  4. Step 4: Simplify right side
    31.83x = 4,386.99
  5. Step 5: Solve for x
    x = 4,386.99/31.83
  6. Step 6: Final answer
    x = 137.83

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.