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Finding the Third Proportional to 127,128 and 172,655

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Solution

The third proportional to 127,128 and 172,655 is: 234,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,128 : 172,655 = 172,655 : x
  2. Step 2: Convert to fraction form
    127,128/172,655 = 172,655/x
  3. Step 3: Cross multiply
    127,128x = 172,655 × 172,655
  4. Step 4: Simplify right side
    127,128x = 29,809,749,025
  5. Step 5: Solve for x
    x = 29,809,749,025/127,128
  6. Step 6: Final answer
    x = 234,486.10

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.