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Finding the Third Proportional to 31,170 and 66,712

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Solution

The third proportional to 31,170 and 66,712 is: 142,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,170 : 66,712 = 66,712 : x
  2. Step 2: Convert to fraction form
    31,170/66,712 = 66,712/x
  3. Step 3: Cross multiply
    31,170x = 66,712 × 66,712
  4. Step 4: Simplify right side
    31,170x = 4,450,490,944
  5. Step 5: Solve for x
    x = 4,450,490,944/31,170
  6. Step 6: Final answer
    x = 142,781.23

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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.