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Finding the Third Proportional to 78,396.50 and 117,771

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Solution

The third proportional to 78,396.50 and 117,771 is: 176,921.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,396.50 : 117,771 = 117,771 : x
  2. Step 2: Convert to fraction form
    78,396.50/117,771 = 117,771/x
  3. Step 3: Cross multiply
    78,396.50x = 117,771 × 117,771
  4. Step 4: Simplify right side
    78,396.50x = 13,870,008,441
  5. Step 5: Solve for x
    x = 13,870,008,441/78,396.50
  6. Step 6: Final answer
    x = 176,921.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.