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Finding the Third Proportional to 65,853 and 138,678.75

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Solution

The third proportional to 65,853 and 138,678.75 is: 292,041.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,853 : 138,678.75 = 138,678.75 : x
  2. Step 2: Convert to fraction form
    65,853/138,678.75 = 138,678.75/x
  3. Step 3: Cross multiply
    65,853x = 138,678.75 × 138,678.75
  4. Step 4: Simplify right side
    65,853x = 19,231,795,701.56
  5. Step 5: Solve for x
    x = 19,231,795,701.56/65,853
  6. Step 6: Final answer
    x = 292,041.30

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.