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Finding the Third Proportional to 68,610 and 139,128

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Solution

The third proportional to 68,610 and 139,128 is: 282,125.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,610 : 139,128 = 139,128 : x
  2. Step 2: Convert to fraction form
    68,610/139,128 = 139,128/x
  3. Step 3: Cross multiply
    68,610x = 139,128 × 139,128
  4. Step 4: Simplify right side
    68,610x = 19,356,600,384
  5. Step 5: Solve for x
    x = 19,356,600,384/68,610
  6. Step 6: Final answer
    x = 282,125.06

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.