Home / 81,979.35-113,183.74-66,907.96

Finding the Fourth Proportional to 81,979.35, 113,183.74 and 66,907.96

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Solution

The fourth proportional to 81,979.35, 113,183.74 and 66,907.96 is: 92,375.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,979.35 : 113,183.74 = 66,907.96 : x
  2. Step 2: Convert to fraction form
    81,979.35/113,183.74 = 66,907.96/x
  3. Step 3: Cross multiply
    81,979.35x = 113,183.74 × 66,907.96
  4. Step 4: Simplify right side
    81,979.35x = 7,572,893,520.83
  5. Step 5: Solve for x
    x = 7,572,893,520.83/81,979.35
  6. Step 6: Final answer
    x = 92,375.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.