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Finding the Third Proportional to 90,486 and 138,168

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Solution

The third proportional to 90,486 and 138,168 is: 210,976.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,486 : 138,168 = 138,168 : x
  2. Step 2: Convert to fraction form
    90,486/138,168 = 138,168/x
  3. Step 3: Cross multiply
    90,486x = 138,168 × 138,168
  4. Step 4: Simplify right side
    90,486x = 19,090,396,224
  5. Step 5: Solve for x
    x = 19,090,396,224/90,486
  6. Step 6: Final answer
    x = 210,976.24

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.