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Finding the Third Proportional to 39,420 and 59,539

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Solution

The third proportional to 39,420 and 59,539 is: 89,926.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,420 : 59,539 = 59,539 : x
  2. Step 2: Convert to fraction form
    39,420/59,539 = 59,539/x
  3. Step 3: Cross multiply
    39,420x = 59,539 × 59,539
  4. Step 4: Simplify right side
    39,420x = 3,544,892,521
  5. Step 5: Solve for x
    x = 3,544,892,521/39,420
  6. Step 6: Final answer
    x = 89,926.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.