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Finding the Third Proportional to 78,476 and 171,623

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Solution

The third proportional to 78,476 and 171,623 is: 375,330.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,476 : 171,623 = 171,623 : x
  2. Step 2: Convert to fraction form
    78,476/171,623 = 171,623/x
  3. Step 3: Cross multiply
    78,476x = 171,623 × 171,623
  4. Step 4: Simplify right side
    78,476x = 29,454,454,129
  5. Step 5: Solve for x
    x = 29,454,454,129/78,476
  6. Step 6: Final answer
    x = 375,330.73

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.