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Finding the Third Proportional to 76,968 and 115,143

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Solution

The third proportional to 76,968 and 115,143 is: 172,252.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,968 : 115,143 = 115,143 : x
  2. Step 2: Convert to fraction form
    76,968/115,143 = 115,143/x
  3. Step 3: Cross multiply
    76,968x = 115,143 × 115,143
  4. Step 4: Simplify right side
    76,968x = 13,257,910,449
  5. Step 5: Solve for x
    x = 13,257,910,449/76,968
  6. Step 6: Final answer
    x = 172,252.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.