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Finding the Third Proportional to 63,642 and 86,391

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Solution

The third proportional to 63,642 and 86,391 is: 117,271.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,642 : 86,391 = 86,391 : x
  2. Step 2: Convert to fraction form
    63,642/86,391 = 86,391/x
  3. Step 3: Cross multiply
    63,642x = 86,391 × 86,391
  4. Step 4: Simplify right side
    63,642x = 7,463,404,881
  5. Step 5: Solve for x
    x = 7,463,404,881/63,642
  6. Step 6: Final answer
    x = 117,271.69

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.