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Finding the Fourth Proportional to 101,974.14, 140,690.39 and 61,672.59

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Solution

The fourth proportional to 101,974.14, 140,690.39 and 61,672.59 is: 85,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,974.14 : 140,690.39 = 61,672.59 : x
  2. Step 2: Convert to fraction form
    101,974.14/140,690.39 = 61,672.59/x
  3. Step 3: Cross multiply
    101,974.14x = 140,690.39 × 61,672.59
  4. Step 4: Simplify right side
    101,974.14x = 8,676,740,431.05
  5. Step 5: Solve for x
    x = 8,676,740,431.05/101,974.14
  6. Step 6: Final answer
    x = 85,087.65

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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.