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Finding the Fourth Proportional to 79,121.79, 109,187.24 and 43,311.87

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Solution

The fourth proportional to 79,121.79, 109,187.24 and 43,311.87 is: 59,769.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.79 : 109,187.24 = 43,311.87 : x
  2. Step 2: Convert to fraction form
    79,121.79/109,187.24 = 43,311.87/x
  3. Step 3: Cross multiply
    79,121.79x = 109,187.24 × 43,311.87
  4. Step 4: Simplify right side
    79,121.79x = 4,729,103,327.98
  5. Step 5: Solve for x
    x = 4,729,103,327.98/79,121.79
  6. Step 6: Final answer
    x = 59,769.92

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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.