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Finding the Third Proportional to 81,415 and 177,518

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Solution

The third proportional to 81,415 and 177,518 is: 387,061.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,415 : 177,518 = 177,518 : x
  2. Step 2: Convert to fraction form
    81,415/177,518 = 177,518/x
  3. Step 3: Cross multiply
    81,415x = 177,518 × 177,518
  4. Step 4: Simplify right side
    81,415x = 31,512,640,324
  5. Step 5: Solve for x
    x = 31,512,640,324/81,415
  6. Step 6: Final answer
    x = 387,061.85

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.