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Finding the Third Proportional to 122,389 and 178,885

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Solution

The third proportional to 122,389 and 178,885 is: 261,460.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,389 : 178,885 = 178,885 : x
  2. Step 2: Convert to fraction form
    122,389/178,885 = 178,885/x
  3. Step 3: Cross multiply
    122,389x = 178,885 × 178,885
  4. Step 4: Simplify right side
    122,389x = 31,999,843,225
  5. Step 5: Solve for x
    x = 31,999,843,225/122,389
  6. Step 6: Final answer
    x = 261,460.12

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.