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Finding the Third Proportional to 90,720 and 136,176

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Solution

The third proportional to 90,720 and 136,176 is: 204,408.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,720 : 136,176 = 136,176 : x
  2. Step 2: Convert to fraction form
    90,720/136,176 = 136,176/x
  3. Step 3: Cross multiply
    90,720x = 136,176 × 136,176
  4. Step 4: Simplify right side
    90,720x = 18,543,902,976
  5. Step 5: Solve for x
    x = 18,543,902,976/90,720
  6. Step 6: Final answer
    x = 204,408.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.