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Finding the Third Proportional to 18,121.50 and 37,881

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Solution

The third proportional to 18,121.50 and 37,881 is: 79,186.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.50 : 37,881 = 37,881 : x
  2. Step 2: Convert to fraction form
    18,121.50/37,881 = 37,881/x
  3. Step 3: Cross multiply
    18,121.50x = 37,881 × 37,881
  4. Step 4: Simplify right side
    18,121.50x = 1,434,970,161
  5. Step 5: Solve for x
    x = 1,434,970,161/18,121.50
  6. Step 6: Final answer
    x = 79,186.06

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.