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Finding the Third Proportional to 31,893 and 69,615

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Solution

The third proportional to 31,893 and 69,615 is: 151,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,893 : 69,615 = 69,615 : x
  2. Step 2: Convert to fraction form
    31,893/69,615 = 69,615/x
  3. Step 3: Cross multiply
    31,893x = 69,615 × 69,615
  4. Step 4: Simplify right side
    31,893x = 4,846,248,225
  5. Step 5: Solve for x
    x = 4,846,248,225/31,893
  6. Step 6: Final answer
    x = 151,953.35

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.