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Finding the Fourth Proportional to 79,371.66, 109,532.81 and 43,561.77

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Solution

The fourth proportional to 79,371.66, 109,532.81 and 43,561.77 is: 60,115.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,371.66 : 109,532.81 = 43,561.77 : x
  2. Step 2: Convert to fraction form
    79,371.66/109,532.81 = 43,561.77/x
  3. Step 3: Cross multiply
    79,371.66x = 109,532.81 × 43,561.77
  4. Step 4: Simplify right side
    79,371.66x = 4,771,442,529.80
  5. Step 5: Solve for x
    x = 4,771,442,529.80/79,371.66
  6. Step 6: Final answer
    x = 60,115.19

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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.