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Finding the Third Proportional to 31,676 and 69,887

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Solution

The third proportional to 31,676 and 69,887 is: 154,192.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,676 : 69,887 = 69,887 : x
  2. Step 2: Convert to fraction form
    31,676/69,887 = 69,887/x
  3. Step 3: Cross multiply
    31,676x = 69,887 × 69,887
  4. Step 4: Simplify right side
    31,676x = 4,884,192,769
  5. Step 5: Solve for x
    x = 4,884,192,769/31,676
  6. Step 6: Final answer
    x = 154,192.22

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.