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Finding the Third Proportional to 66,929 and 89,229

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Solution

The third proportional to 66,929 and 89,229 is: 118,959.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,929 : 89,229 = 89,229 : x
  2. Step 2: Convert to fraction form
    66,929/89,229 = 89,229/x
  3. Step 3: Cross multiply
    66,929x = 89,229 × 89,229
  4. Step 4: Simplify right side
    66,929x = 7,961,814,441
  5. Step 5: Solve for x
    x = 7,961,814,441/66,929
  6. Step 6: Final answer
    x = 118,959.11

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.