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Finding the Third Proportional to 87,420 and 187,305

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Solution

The third proportional to 87,420 and 187,305 is: 401,317.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,420 : 187,305 = 187,305 : x
  2. Step 2: Convert to fraction form
    87,420/187,305 = 187,305/x
  3. Step 3: Cross multiply
    87,420x = 187,305 × 187,305
  4. Step 4: Simplify right side
    87,420x = 35,083,163,025
  5. Step 5: Solve for x
    x = 35,083,163,025/87,420
  6. Step 6: Final answer
    x = 401,317.35

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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.