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Finding the Third Proportional to 90,912 and 136,440

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Solution

The third proportional to 90,912 and 136,440 is: 204,768.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912 : 136,440 = 136,440 : x
  2. Step 2: Convert to fraction form
    90,912/136,440 = 136,440/x
  3. Step 3: Cross multiply
    90,912x = 136,440 × 136,440
  4. Step 4: Simplify right side
    90,912x = 18,615,873,600
  5. Step 5: Solve for x
    x = 18,615,873,600/90,912
  6. Step 6: Final answer
    x = 204,768.06

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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.