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Finding the Third Proportional to 90,678 and 133,251

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Solution

The third proportional to 90,678 and 133,251 is: 195,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,678 : 133,251 = 133,251 : x
  2. Step 2: Convert to fraction form
    90,678/133,251 = 133,251/x
  3. Step 3: Cross multiply
    90,678x = 133,251 × 133,251
  4. Step 4: Simplify right side
    90,678x = 17,755,829,001
  5. Step 5: Solve for x
    x = 17,755,829,001/90,678
  6. Step 6: Final answer
    x = 195,811.87

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.