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Finding the Third Proportional to 30,929 and 68,942

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Solution

The third proportional to 30,929 and 68,942 is: 153,674.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,929 : 68,942 = 68,942 : x
  2. Step 2: Convert to fraction form
    30,929/68,942 = 68,942/x
  3. Step 3: Cross multiply
    30,929x = 68,942 × 68,942
  4. Step 4: Simplify right side
    30,929x = 4,752,999,364
  5. Step 5: Solve for x
    x = 4,752,999,364/30,929
  6. Step 6: Final answer
    x = 153,674.52

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.