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Finding the Third Proportional to 21,015 and 45,219

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Solution

The third proportional to 21,015 and 45,219 is: 97,299.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015 : 45,219 = 45,219 : x
  2. Step 2: Convert to fraction form
    21,015/45,219 = 45,219/x
  3. Step 3: Cross multiply
    21,015x = 45,219 × 45,219
  4. Step 4: Simplify right side
    21,015x = 2,044,757,961
  5. Step 5: Solve for x
    x = 2,044,757,961/21,015
  6. Step 6: Final answer
    x = 97,299.93

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.