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Finding the Third Proportional to 100,380 and 147,800

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Solution

The third proportional to 100,380 and 147,800 is: 217,621.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,380 : 147,800 = 147,800 : x
  2. Step 2: Convert to fraction form
    100,380/147,800 = 147,800/x
  3. Step 3: Cross multiply
    100,380x = 147,800 × 147,800
  4. Step 4: Simplify right side
    100,380x = 21,844,840,000
  5. Step 5: Solve for x
    x = 21,844,840,000/100,380
  6. Step 6: Final answer
    x = 217,621.44

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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.