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Finding the Third Proportional to 21,108 and 45,090

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Solution

The third proportional to 21,108 and 45,090 is: 96,319.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108 : 45,090 = 45,090 : x
  2. Step 2: Convert to fraction form
    21,108/45,090 = 45,090/x
  3. Step 3: Cross multiply
    21,108x = 45,090 × 45,090
  4. Step 4: Simplify right side
    21,108x = 2,033,108,100
  5. Step 5: Solve for x
    x = 2,033,108,100/21,108
  6. Step 6: Final answer
    x = 96,319.31

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.