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Finding the Third Proportional to 65,388 and 138,623

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Solution

The third proportional to 65,388 and 138,623 is: 293,881.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,388 : 138,623 = 138,623 : x
  2. Step 2: Convert to fraction form
    65,388/138,623 = 138,623/x
  3. Step 3: Cross multiply
    65,388x = 138,623 × 138,623
  4. Step 4: Simplify right side
    65,388x = 19,216,336,129
  5. Step 5: Solve for x
    x = 19,216,336,129/65,388
  6. Step 6: Final answer
    x = 293,881.69

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.