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Finding the Third Proportional to 128,616 and 201,156

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Solution

The third proportional to 128,616 and 201,156 is: 314,608.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,616 : 201,156 = 201,156 : x
  2. Step 2: Convert to fraction form
    128,616/201,156 = 201,156/x
  3. Step 3: Cross multiply
    128,616x = 201,156 × 201,156
  4. Step 4: Simplify right side
    128,616x = 40,463,736,336
  5. Step 5: Solve for x
    x = 40,463,736,336/128,616
  6. Step 6: Final answer
    x = 314,608.88

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.