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Finding the Third Proportional to 39,178 and 82,388

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Solution

The third proportional to 39,178 and 82,388 is: 173,254.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,178 : 82,388 = 82,388 : x
  2. Step 2: Convert to fraction form
    39,178/82,388 = 82,388/x
  3. Step 3: Cross multiply
    39,178x = 82,388 × 82,388
  4. Step 4: Simplify right side
    39,178x = 6,787,782,544
  5. Step 5: Solve for x
    x = 6,787,782,544/39,178
  6. Step 6: Final answer
    x = 173,254.95

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.