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Finding the Third Proportional to 54,378 and 84,699

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Solution

The third proportional to 54,378 and 84,699 is: 131,926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,378 : 84,699 = 84,699 : x
  2. Step 2: Convert to fraction form
    54,378/84,699 = 84,699/x
  3. Step 3: Cross multiply
    54,378x = 84,699 × 84,699
  4. Step 4: Simplify right side
    54,378x = 7,173,920,601
  5. Step 5: Solve for x
    x = 7,173,920,601/54,378
  6. Step 6: Final answer
    x = 131,926.89

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.