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Finding the Third Proportional to 138,468 and 216,925

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Solution

The third proportional to 138,468 and 216,925 is: 339,836.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,468 : 216,925 = 216,925 : x
  2. Step 2: Convert to fraction form
    138,468/216,925 = 216,925/x
  3. Step 3: Cross multiply
    138,468x = 216,925 × 216,925
  4. Step 4: Simplify right side
    138,468x = 47,056,455,625
  5. Step 5: Solve for x
    x = 47,056,455,625/138,468
  6. Step 6: Final answer
    x = 339,836.32

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.