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Finding the Third Proportional to 100,378.50 and 137,644.50

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Solution

The third proportional to 100,378.50 and 137,644.50 is: 188,745.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,378.50 : 137,644.50 = 137,644.50 : x
  2. Step 2: Convert to fraction form
    100,378.50/137,644.50 = 137,644.50/x
  3. Step 3: Cross multiply
    100,378.50x = 137,644.50 × 137,644.50
  4. Step 4: Simplify right side
    100,378.50x = 18,946,008,380.25
  5. Step 5: Solve for x
    x = 18,946,008,380.25/100,378.50
  6. Step 6: Final answer
    x = 188,745.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.