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Finding the Third Proportional to 120,718 and 172,377

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Solution

The third proportional to 120,718 and 172,377 is: 246,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,718 : 172,377 = 172,377 : x
  2. Step 2: Convert to fraction form
    120,718/172,377 = 172,377/x
  3. Step 3: Cross multiply
    120,718x = 172,377 × 172,377
  4. Step 4: Simplify right side
    120,718x = 29,713,830,129
  5. Step 5: Solve for x
    x = 29,713,830,129/120,718
  6. Step 6: Final answer
    x = 246,142.50

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.