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Finding the Third Proportional to 36,331 and 78,890

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Solution

The third proportional to 36,331 and 78,890 is: 171,303.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,331 : 78,890 = 78,890 : x
  2. Step 2: Convert to fraction form
    36,331/78,890 = 78,890/x
  3. Step 3: Cross multiply
    36,331x = 78,890 × 78,890
  4. Step 4: Simplify right side
    36,331x = 6,223,632,100
  5. Step 5: Solve for x
    x = 6,223,632,100/36,331
  6. Step 6: Final answer
    x = 171,303.63

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.