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Finding the Fourth Proportional to 57,421.42, 79,241.81 and 31,930.11

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Solution

The fourth proportional to 57,421.42, 79,241.81 and 31,930.11 is: 44,063.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,421.42 : 79,241.81 = 31,930.11 : x
  2. Step 2: Convert to fraction form
    57,421.42/79,241.81 = 31,930.11/x
  3. Step 3: Cross multiply
    57,421.42x = 79,241.81 × 31,930.11
  4. Step 4: Simplify right side
    57,421.42x = 2,530,199,550.25
  5. Step 5: Solve for x
    x = 2,530,199,550.25/57,421.42
  6. Step 6: Final answer
    x = 44,063.69

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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.