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Finding the Third Proportional to 31,248 and 68,750

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Solution

The third proportional to 31,248 and 68,750 is: 151,259.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,248 : 68,750 = 68,750 : x
  2. Step 2: Convert to fraction form
    31,248/68,750 = 68,750/x
  3. Step 3: Cross multiply
    31,248x = 68,750 × 68,750
  4. Step 4: Simplify right side
    31,248x = 4,726,562,500
  5. Step 5: Solve for x
    x = 4,726,562,500/31,248
  6. Step 6: Final answer
    x = 151,259.68

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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.