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Finding the Third Proportional to 79,990.31 and 172,809

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Solution

The third proportional to 79,990.31 and 172,809 is: 373,332.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,990.31 : 172,809 = 172,809 : x
  2. Step 2: Convert to fraction form
    79,990.31/172,809 = 172,809/x
  3. Step 3: Cross multiply
    79,990.31x = 172,809 × 172,809
  4. Step 4: Simplify right side
    79,990.31x = 29,862,950,481
  5. Step 5: Solve for x
    x = 29,862,950,481/79,990.31
  6. Step 6: Final answer
    x = 373,332.09

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.