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Finding the Third Proportional to 39,645 and 86,631.75

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Solution

The third proportional to 39,645 and 86,631.75 is: 189,306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,645 : 86,631.75 = 86,631.75 : x
  2. Step 2: Convert to fraction form
    39,645/86,631.75 = 86,631.75/x
  3. Step 3: Cross multiply
    39,645x = 86,631.75 × 86,631.75
  4. Step 4: Simplify right side
    39,645x = 7,505,060,108.06
  5. Step 5: Solve for x
    x = 7,505,060,108.06/39,645
  6. Step 6: Final answer
    x = 189,306.60

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.