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Finding the Third Proportional to 31,375 and 68,970

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Solution

The third proportional to 31,375 and 68,970 is: 151,613.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,375 : 68,970 = 68,970 : x
  2. Step 2: Convert to fraction form
    31,375/68,970 = 68,970/x
  3. Step 3: Cross multiply
    31,375x = 68,970 × 68,970
  4. Step 4: Simplify right side
    31,375x = 4,756,860,900
  5. Step 5: Solve for x
    x = 4,756,860,900/31,375
  6. Step 6: Final answer
    x = 151,613.10

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.