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Finding the Fourth Proportional to 57,372.99, 79,172.69 and 31,879.05

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Solution

The fourth proportional to 57,372.99, 79,172.69 and 31,879.05 is: 43,991.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,372.99 : 79,172.69 = 31,879.05 : x
  2. Step 2: Convert to fraction form
    57,372.99/79,172.69 = 31,879.05/x
  3. Step 3: Cross multiply
    57,372.99x = 79,172.69 × 31,879.05
  4. Step 4: Simplify right side
    57,372.99x = 2,523,949,983.75
  5. Step 5: Solve for x
    x = 2,523,949,983.75/57,372.99
  6. Step 6: Final answer
    x = 43,991.95

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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.