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Finding the Fourth Proportional to 57,399.91, 79,211.34 and 31,905.61

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Solution

The fourth proportional to 57,399.91, 79,211.34 and 31,905.61 is: 44,029.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,399.91 : 79,211.34 = 31,905.61 : x
  2. Step 2: Convert to fraction form
    57,399.91/79,211.34 = 31,905.61/x
  3. Step 3: Cross multiply
    57,399.91x = 79,211.34 × 31,905.61
  4. Step 4: Simplify right side
    57,399.91x = 2,527,286,121.62
  5. Step 5: Solve for x
    x = 2,527,286,121.62/57,399.91
  6. Step 6: Final answer
    x = 44,029.44

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1.5x scale

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.