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Finding the Third Proportional to 39,416 and 85,390

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Solution

The third proportional to 39,416 and 85,390 is: 184,987.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,416 : 85,390 = 85,390 : x
  2. Step 2: Convert to fraction form
    39,416/85,390 = 85,390/x
  3. Step 3: Cross multiply
    39,416x = 85,390 × 85,390
  4. Step 4: Simplify right side
    39,416x = 7,291,452,100
  5. Step 5: Solve for x
    x = 7,291,452,100/39,416
  6. Step 6: Final answer
    x = 184,987.11

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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.