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Finding the Third Proportional to 60,331 and 90,380

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Solution

The third proportional to 60,331 and 90,380 is: 135,395.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,331 : 90,380 = 90,380 : x
  2. Step 2: Convert to fraction form
    60,331/90,380 = 90,380/x
  3. Step 3: Cross multiply
    60,331x = 90,380 × 90,380
  4. Step 4: Simplify right side
    60,331x = 8,168,544,400
  5. Step 5: Solve for x
    x = 8,168,544,400/60,331
  6. Step 6: Final answer
    x = 135,395.47

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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.