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Finding the Third Proportional to 85,311 and 133,816

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Solution

The third proportional to 85,311 and 133,816 is: 209,899.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311 : 133,816 = 133,816 : x
  2. Step 2: Convert to fraction form
    85,311/133,816 = 133,816/x
  3. Step 3: Cross multiply
    85,311x = 133,816 × 133,816
  4. Step 4: Simplify right side
    85,311x = 17,906,721,856
  5. Step 5: Solve for x
    x = 17,906,721,856/85,311
  6. Step 6: Final answer
    x = 209,899.33

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.