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Finding the Fourth Proportional to 79,120.44, 109,187.88 and 43,311.96

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Solution

The fourth proportional to 79,120.44, 109,187.88 and 43,311.96 is: 59,771.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,120.44 : 109,187.88 = 43,311.96 : x
  2. Step 2: Convert to fraction form
    79,120.44/109,187.88 = 43,311.96/x
  3. Step 3: Cross multiply
    79,120.44x = 109,187.88 × 43,311.96
  4. Step 4: Simplify right side
    79,120.44x = 4,729,141,091.04
  5. Step 5: Solve for x
    x = 4,729,141,091.04/79,120.44
  6. Step 6: Final answer
    x = 59,771.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.