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Finding the Third Proportional to 90,869 and 129,218

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Solution

The third proportional to 90,869 and 129,218 is: 183,751.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,869 : 129,218 = 129,218 : x
  2. Step 2: Convert to fraction form
    90,869/129,218 = 129,218/x
  3. Step 3: Cross multiply
    90,869x = 129,218 × 129,218
  4. Step 4: Simplify right side
    90,869x = 16,697,291,524
  5. Step 5: Solve for x
    x = 16,697,291,524/90,869
  6. Step 6: Final answer
    x = 183,751.24

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.