Home / 76,789.35-115,185.84-20,629.53

Finding the Fourth Proportional to 76,789.35, 115,185.84 and 20,629.53

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Solution

The fourth proportional to 76,789.35, 115,185.84 and 20,629.53 is: 30,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,789.35 : 115,185.84 = 20,629.53 : x
  2. Step 2: Convert to fraction form
    76,789.35/115,185.84 = 20,629.53/x
  3. Step 3: Cross multiply
    76,789.35x = 115,185.84 × 20,629.53
  4. Step 4: Simplify right side
    76,789.35x = 2,376,229,741.86
  5. Step 5: Solve for x
    x = 2,376,229,741.86/76,789.35
  6. Step 6: Final answer
    x = 30,944.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.