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Finding the Third Proportional to 54,779 and 78,279.50

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Solution

The third proportional to 54,779 and 78,279.50 is: 111,861.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,779 : 78,279.50 = 78,279.50 : x
  2. Step 2: Convert to fraction form
    54,779/78,279.50 = 78,279.50/x
  3. Step 3: Cross multiply
    54,779x = 78,279.50 × 78,279.50
  4. Step 4: Simplify right side
    54,779x = 6,127,680,120.25
  5. Step 5: Solve for x
    x = 6,127,680,120.25/54,779
  6. Step 6: Final answer
    x = 111,861.85

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.