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Finding the Third Proportional to 138,763 and 208,164

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Solution

The third proportional to 138,763 and 208,164 is: 312,275.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,763 : 208,164 = 208,164 : x
  2. Step 2: Convert to fraction form
    138,763/208,164 = 208,164/x
  3. Step 3: Cross multiply
    138,763x = 208,164 × 208,164
  4. Step 4: Simplify right side
    138,763x = 43,332,250,896
  5. Step 5: Solve for x
    x = 43,332,250,896/138,763
  6. Step 6: Final answer
    x = 312,275.25

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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.