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Finding the Third Proportional to 27,789 and 61,140

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Solution

The third proportional to 27,789 and 61,140 is: 134,517.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,789 : 61,140 = 61,140 : x
  2. Step 2: Convert to fraction form
    27,789/61,140 = 61,140/x
  3. Step 3: Cross multiply
    27,789x = 61,140 × 61,140
  4. Step 4: Simplify right side
    27,789x = 3,738,099,600
  5. Step 5: Solve for x
    x = 3,738,099,600/27,789
  6. Step 6: Final answer
    x = 134,517.24

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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.