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Finding the Third Proportional to 78,988.50 and 188,865

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Solution

The third proportional to 78,988.50 and 188,865 is: 451,584.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.50 : 188,865 = 188,865 : x
  2. Step 2: Convert to fraction form
    78,988.50/188,865 = 188,865/x
  3. Step 3: Cross multiply
    78,988.50x = 188,865 × 188,865
  4. Step 4: Simplify right side
    78,988.50x = 35,669,988,225
  5. Step 5: Solve for x
    x = 35,669,988,225/78,988.50
  6. Step 6: Final answer
    x = 451,584.58

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.