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Finding the Third Proportional to 31,380 and 45,369

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Solution

The third proportional to 31,380 and 45,369 is: 65,594.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,380 : 45,369 = 45,369 : x
  2. Step 2: Convert to fraction form
    31,380/45,369 = 45,369/x
  3. Step 3: Cross multiply
    31,380x = 45,369 × 45,369
  4. Step 4: Simplify right side
    31,380x = 2,058,346,161
  5. Step 5: Solve for x
    x = 2,058,346,161/31,380
  6. Step 6: Final answer
    x = 65,594.21

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.