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Finding the Fourth Proportional to 57,872, 79,863.48 and 31,376

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Solution

The fourth proportional to 57,872, 79,863.48 and 31,376 is: 43,298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,872 : 79,863.48 = 31,376 : x
  2. Step 2: Convert to fraction form
    57,872/79,863.48 = 31,376/x
  3. Step 3: Cross multiply
    57,872x = 79,863.48 × 31,376
  4. Step 4: Simplify right side
    57,872x = 2,505,796,548.48
  5. Step 5: Solve for x
    x = 2,505,796,548.48/57,872
  6. Step 6: Final answer
    x = 43,298.95

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.