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Finding the Third Proportional to 67,890 and 103,416

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Solution

The third proportional to 67,890 and 103,416 is: 157,532.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,890 : 103,416 = 103,416 : x
  2. Step 2: Convert to fraction form
    67,890/103,416 = 103,416/x
  3. Step 3: Cross multiply
    67,890x = 103,416 × 103,416
  4. Step 4: Simplify right side
    67,890x = 10,694,869,056
  5. Step 5: Solve for x
    x = 10,694,869,056/67,890
  6. Step 6: Final answer
    x = 157,532.32

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.