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Finding the Fourth Proportional to 57,871.28, 79,863.72 and 32,720.96

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Solution

The fourth proportional to 57,871.28, 79,863.72 and 32,720.96 is: 45,155.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,871.28 : 79,863.72 = 32,720.96 : x
  2. Step 2: Convert to fraction form
    57,871.28/79,863.72 = 32,720.96/x
  3. Step 3: Cross multiply
    57,871.28x = 79,863.72 × 32,720.96
  4. Step 4: Simplify right side
    57,871.28x = 2,613,217,587.57
  5. Step 5: Solve for x
    x = 2,613,217,587.57/57,871.28
  6. Step 6: Final answer
    x = 45,155.69

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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.