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Finding the Third Proportional to 115,245 and 155,357

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Solution

The third proportional to 115,245 and 155,357 is: 209,430.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,245 : 155,357 = 155,357 : x
  2. Step 2: Convert to fraction form
    115,245/155,357 = 155,357/x
  3. Step 3: Cross multiply
    115,245x = 155,357 × 155,357
  4. Step 4: Simplify right side
    115,245x = 24,135,797,449
  5. Step 5: Solve for x
    x = 24,135,797,449/115,245
  6. Step 6: Final answer
    x = 209,430.32

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.