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Finding the Third Proportional to 108,420 and 172,668

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Solution

The third proportional to 108,420 and 172,668 is: 274,988.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,420 : 172,668 = 172,668 : x
  2. Step 2: Convert to fraction form
    108,420/172,668 = 172,668/x
  3. Step 3: Cross multiply
    108,420x = 172,668 × 172,668
  4. Step 4: Simplify right side
    108,420x = 29,814,238,224
  5. Step 5: Solve for x
    x = 29,814,238,224/108,420
  6. Step 6: Final answer
    x = 274,988.36

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.