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Finding the Third Proportional to 84,420 and 122,292

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Solution

The third proportional to 84,420 and 122,292 is: 177,153.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,420 : 122,292 = 122,292 : x
  2. Step 2: Convert to fraction form
    84,420/122,292 = 122,292/x
  3. Step 3: Cross multiply
    84,420x = 122,292 × 122,292
  4. Step 4: Simplify right side
    84,420x = 14,955,333,264
  5. Step 5: Solve for x
    x = 14,955,333,264/84,420
  6. Step 6: Final answer
    x = 177,153.91

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.