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Finding the Third Proportional to 31,111 and 68,269

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Solution

The third proportional to 31,111 and 68,269 is: 149,807.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,111 : 68,269 = 68,269 : x
  2. Step 2: Convert to fraction form
    31,111/68,269 = 68,269/x
  3. Step 3: Cross multiply
    31,111x = 68,269 × 68,269
  4. Step 4: Simplify right side
    31,111x = 4,660,656,361
  5. Step 5: Solve for x
    x = 4,660,656,361/31,111
  6. Step 6: Final answer
    x = 149,807.35

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.