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Finding the Third Proportional to 40,905 and 84,420

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Solution

The third proportional to 40,905 and 84,420 is: 174,226.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,905 : 84,420 = 84,420 : x
  2. Step 2: Convert to fraction form
    40,905/84,420 = 84,420/x
  3. Step 3: Cross multiply
    40,905x = 84,420 × 84,420
  4. Step 4: Simplify right side
    40,905x = 7,126,736,400
  5. Step 5: Solve for x
    x = 7,126,736,400/40,905
  6. Step 6: Final answer
    x = 174,226.53

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.