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Finding the Third Proportional to 31,218 and 47,226

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Solution

The third proportional to 31,218 and 47,226 is: 71,442.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,218 : 47,226 = 47,226 : x
  2. Step 2: Convert to fraction form
    31,218/47,226 = 47,226/x
  3. Step 3: Cross multiply
    31,218x = 47,226 × 47,226
  4. Step 4: Simplify right side
    31,218x = 2,230,295,076
  5. Step 5: Solve for x
    x = 2,230,295,076/31,218
  6. Step 6: Final answer
    x = 71,442.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.