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Finding the Fourth Proportional to 57,369.91, 79,170.21 and 31,880.42

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Solution

The fourth proportional to 57,369.91, 79,170.21 and 31,880.42 is: 43,994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,369.91 : 79,170.21 = 31,880.42 : x
  2. Step 2: Convert to fraction form
    57,369.91/79,170.21 = 31,880.42/x
  3. Step 3: Cross multiply
    57,369.91x = 79,170.21 × 31,880.42
  4. Step 4: Simplify right side
    57,369.91x = 2,523,979,546.29
  5. Step 5: Solve for x
    x = 2,523,979,546.29/57,369.91
  6. Step 6: Final answer
    x = 43,994.84

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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.