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Finding the Third Proportional to 68,428 and 105,042

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Solution

The third proportional to 68,428 and 105,042 is: 161,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,428 : 105,042 = 105,042 : x
  2. Step 2: Convert to fraction form
    68,428/105,042 = 105,042/x
  3. Step 3: Cross multiply
    68,428x = 105,042 × 105,042
  4. Step 4: Simplify right side
    68,428x = 11,033,821,764
  5. Step 5: Solve for x
    x = 11,033,821,764/68,428
  6. Step 6: Final answer
    x = 161,247.18

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.