Home / 76,867.39-115,313.18-20,709.68

Finding the Fourth Proportional to 76,867.39, 115,313.18 and 20,709.68

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Solution

The fourth proportional to 76,867.39, 115,313.18 and 20,709.68 is: 31,067.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,867.39 : 115,313.18 = 20,709.68 : x
  2. Step 2: Convert to fraction form
    76,867.39/115,313.18 = 20,709.68/x
  3. Step 3: Cross multiply
    76,867.39x = 115,313.18 × 20,709.68
  4. Step 4: Simplify right side
    76,867.39x = 2,388,099,397.64
  5. Step 5: Solve for x
    x = 2,388,099,397.64/76,867.39
  6. Step 6: Final answer
    x = 31,067.78

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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.