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Finding the Third Proportional to 31,230 and 66,922

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Solution

The third proportional to 31,230 and 66,922 is: 143,405.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,230 : 66,922 = 66,922 : x
  2. Step 2: Convert to fraction form
    31,230/66,922 = 66,922/x
  3. Step 3: Cross multiply
    31,230x = 66,922 × 66,922
  4. Step 4: Simplify right side
    31,230x = 4,478,554,084
  5. Step 5: Solve for x
    x = 4,478,554,084/31,230
  6. Step 6: Final answer
    x = 143,405.51

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.