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Finding the Third Proportional to 100,388 and 147,812

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Solution

The third proportional to 100,388 and 147,812 is: 217,639.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,388 : 147,812 = 147,812 : x
  2. Step 2: Convert to fraction form
    100,388/147,812 = 147,812/x
  3. Step 3: Cross multiply
    100,388x = 147,812 × 147,812
  4. Step 4: Simplify right side
    100,388x = 21,848,387,344
  5. Step 5: Solve for x
    x = 21,848,387,344/100,388
  6. Step 6: Final answer
    x = 217,639.43

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.