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Finding the Third Proportional to 39,385 and 85,330

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Solution

The third proportional to 39,385 and 85,330 is: 184,872.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,385 : 85,330 = 85,330 : x
  2. Step 2: Convert to fraction form
    39,385/85,330 = 85,330/x
  3. Step 3: Cross multiply
    39,385x = 85,330 × 85,330
  4. Step 4: Simplify right side
    39,385x = 7,281,208,900
  5. Step 5: Solve for x
    x = 7,281,208,900/39,385
  6. Step 6: Final answer
    x = 184,872.64

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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.