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Finding the Fourth Proportional to 43,797.90, 65,719.80 and 20,112.60

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Solution

The fourth proportional to 43,797.90, 65,719.80 and 20,112.60 is: 30,179.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,797.90 : 65,719.80 = 20,112.60 : x
  2. Step 2: Convert to fraction form
    43,797.90/65,719.80 = 20,112.60/x
  3. Step 3: Cross multiply
    43,797.90x = 65,719.80 × 20,112.60
  4. Step 4: Simplify right side
    43,797.90x = 1,321,796,049.48
  5. Step 5: Solve for x
    x = 1,321,796,049.48/43,797.90
  6. Step 6: Final answer
    x = 30,179.44

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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.