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Finding the Third Proportional to 39,396 and 85,428

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Solution

The third proportional to 39,396 and 85,428 is: 185,245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,396 : 85,428 = 85,428 : x
  2. Step 2: Convert to fraction form
    39,396/85,428 = 85,428/x
  3. Step 3: Cross multiply
    39,396x = 85,428 × 85,428
  4. Step 4: Simplify right side
    39,396x = 7,297,943,184
  5. Step 5: Solve for x
    x = 7,297,943,184/39,396
  6. Step 6: Final answer
    x = 185,245.79

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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.