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Finding the Third Proportional to 37,890 and 79,708

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Solution

The third proportional to 37,890 and 79,708 is: 167,679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,890 : 79,708 = 79,708 : x
  2. Step 2: Convert to fraction form
    37,890/79,708 = 79,708/x
  3. Step 3: Cross multiply
    37,890x = 79,708 × 79,708
  4. Step 4: Simplify right side
    37,890x = 6,353,365,264
  5. Step 5: Solve for x
    x = 6,353,365,264/37,890
  6. Step 6: Final answer
    x = 167,679.21

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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.