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Finding the Third Proportional to 156,963 and 221,138

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Solution

The third proportional to 156,963 and 221,138 is: 311,551.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,963 : 221,138 = 221,138 : x
  2. Step 2: Convert to fraction form
    156,963/221,138 = 221,138/x
  3. Step 3: Cross multiply
    156,963x = 221,138 × 221,138
  4. Step 4: Simplify right side
    156,963x = 48,902,015,044
  5. Step 5: Solve for x
    x = 48,902,015,044/156,963
  6. Step 6: Final answer
    x = 311,551.23

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.