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Finding the Fourth Proportional to 29,976.60, 44,964.90 and 20,120.60

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Solution

The fourth proportional to 29,976.60, 44,964.90 and 20,120.60 is: 30,180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,976.60 : 44,964.90 = 20,120.60 : x
  2. Step 2: Convert to fraction form
    29,976.60/44,964.90 = 20,120.60/x
  3. Step 3: Cross multiply
    29,976.60x = 44,964.90 × 20,120.60
  4. Step 4: Simplify right side
    29,976.60x = 904,720,766.94
  5. Step 5: Solve for x
    x = 904,720,766.94/29,976.60
  6. Step 6: Final answer
    x = 30,180.90

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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.