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Finding the Fourth Proportional to 245,431.05, 368,105.56 and 67,956

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Solution

The fourth proportional to 245,431.05, 368,105.56 and 67,956 is: 101,922.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,431.05 : 368,105.56 = 67,956 : x
  2. Step 2: Convert to fraction form
    245,431.05/368,105.56 = 67,956/x
  3. Step 3: Cross multiply
    245,431.05x = 368,105.56 × 67,956
  4. Step 4: Simplify right side
    245,431.05x = 25,014,981,435.36
  5. Step 5: Solve for x
    x = 25,014,981,435.36/245,431.05
  6. Step 6: Final answer
    x = 101,922.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.