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Finding the Third Proportional to 42,390 and 63,539

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Solution

The third proportional to 42,390 and 63,539 is: 95,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390 : 63,539 = 63,539 : x
  2. Step 2: Convert to fraction form
    42,390/63,539 = 63,539/x
  3. Step 3: Cross multiply
    42,390x = 63,539 × 63,539
  4. Step 4: Simplify right side
    42,390x = 4,037,204,521
  5. Step 5: Solve for x
    x = 4,037,204,521/42,390
  6. Step 6: Final answer
    x = 95,239.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.