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Finding the Third Proportional to 30,779.25 and 66,156.25

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Solution

The third proportional to 30,779.25 and 66,156.25 is: 142,194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,779.25 : 66,156.25 = 66,156.25 : x
  2. Step 2: Convert to fraction form
    30,779.25/66,156.25 = 66,156.25/x
  3. Step 3: Cross multiply
    30,779.25x = 66,156.25 × 66,156.25
  4. Step 4: Simplify right side
    30,779.25x = 4,376,649,414.06
  5. Step 5: Solve for x
    x = 4,376,649,414.06/30,779.25
  6. Step 6: Final answer
    x = 142,194.80

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.