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Finding the Third Proportional to 85,538 and 115,185

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Solution

The third proportional to 85,538 and 115,185 is: 155,107.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,538 : 115,185 = 115,185 : x
  2. Step 2: Convert to fraction form
    85,538/115,185 = 115,185/x
  3. Step 3: Cross multiply
    85,538x = 115,185 × 115,185
  4. Step 4: Simplify right side
    85,538x = 13,267,584,225
  5. Step 5: Solve for x
    x = 13,267,584,225/85,538
  6. Step 6: Final answer
    x = 155,107.49

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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.