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Finding the Fourth Proportional to 57,745.88, 79,689.31 and 31,249.88

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Solution

The fourth proportional to 57,745.88, 79,689.31 and 31,249.88 is: 43,124.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,745.88 : 79,689.31 = 31,249.88 : x
  2. Step 2: Convert to fraction form
    57,745.88/79,689.31 = 31,249.88/x
  3. Step 3: Cross multiply
    57,745.88x = 79,689.31 × 31,249.88
  4. Step 4: Simplify right side
    57,745.88x = 2,490,280,898.21
  5. Step 5: Solve for x
    x = 2,490,280,898.21/57,745.88
  6. Step 6: Final answer
    x = 43,124.83

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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.