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Finding the Fourth Proportional to 57,745.50, 79,688.83 and 31,249.50

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Solution

The fourth proportional to 57,745.50, 79,688.83 and 31,249.50 is: 43,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,745.50 : 79,688.83 = 31,249.50 : x
  2. Step 2: Convert to fraction form
    57,745.50/79,688.83 = 31,249.50/x
  3. Step 3: Cross multiply
    57,745.50x = 79,688.83 × 31,249.50
  4. Step 4: Simplify right side
    57,745.50x = 2,490,236,093.09
  5. Step 5: Solve for x
    x = 2,490,236,093.09/57,745.50
  6. Step 6: Final answer
    x = 43,124.33

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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.