Home / 76,940.30-115,340.79-30,180.62

Finding the Fourth Proportional to 76,940.30, 115,340.79 and 30,180.62

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Solution

The fourth proportional to 76,940.30, 115,340.79 and 30,180.62 is: 45,243.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,940.30 : 115,340.79 = 30,180.62 : x
  2. Step 2: Convert to fraction form
    76,940.30/115,340.79 = 30,180.62/x
  3. Step 3: Cross multiply
    76,940.30x = 115,340.79 × 30,180.62
  4. Step 4: Simplify right side
    76,940.30x = 3,481,056,553.49
  5. Step 5: Solve for x
    x = 3,481,056,553.49/76,940.30
  6. Step 6: Final answer
    x = 45,243.61

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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.