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Finding the Fourth Proportional to 57,939.75, 79,956.86 and 31,443.75

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Solution

The fourth proportional to 57,939.75, 79,956.86 and 31,443.75 is: 43,392.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,939.75 : 79,956.86 = 31,443.75 : x
  2. Step 2: Convert to fraction form
    57,939.75/79,956.86 = 31,443.75/x
  3. Step 3: Cross multiply
    57,939.75x = 79,956.86 × 31,443.75
  4. Step 4: Simplify right side
    57,939.75x = 2,514,143,516.63
  5. Step 5: Solve for x
    x = 2,514,143,516.63/57,939.75
  6. Step 6: Final answer
    x = 43,392.38

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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.