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Finding the Third Proportional to 39,138 and 76,278

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Solution

The third proportional to 39,138 and 76,278 is: 148,662.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138 : 76,278 = 76,278 : x
  2. Step 2: Convert to fraction form
    39,138/76,278 = 76,278/x
  3. Step 3: Cross multiply
    39,138x = 76,278 × 76,278
  4. Step 4: Simplify right side
    39,138x = 5,818,333,284
  5. Step 5: Solve for x
    x = 5,818,333,284/39,138
  6. Step 6: Final answer
    x = 148,662.00

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.