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Finding the Fourth Proportional to 57,601, 79,489.38 and 31,105

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Solution

The fourth proportional to 57,601, 79,489.38 and 31,105 is: 42,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,601 : 79,489.38 = 31,105 : x
  2. Step 2: Convert to fraction form
    57,601/79,489.38 = 31,105/x
  3. Step 3: Cross multiply
    57,601x = 79,489.38 × 31,105
  4. Step 4: Simplify right side
    57,601x = 2,472,517,164.90
  5. Step 5: Solve for x
    x = 2,472,517,164.90/57,601
  6. Step 6: Final answer
    x = 42,924.90

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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.