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Finding the Third Proportional to 77,689 and 169,218

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Solution

The third proportional to 77,689 and 169,218 is: 368,581.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,689 : 169,218 = 169,218 : x
  2. Step 2: Convert to fraction form
    77,689/169,218 = 169,218/x
  3. Step 3: Cross multiply
    77,689x = 169,218 × 169,218
  4. Step 4: Simplify right side
    77,689x = 28,634,731,524
  5. Step 5: Solve for x
    x = 28,634,731,524/77,689
  6. Step 6: Final answer
    x = 368,581.54

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.