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Finding the Fourth Proportional to 68,942.80, 103,424.72 and 35,190.40

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Solution

The fourth proportional to 68,942.80, 103,424.72 and 35,190.40 is: 52,790.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,942.80 : 103,424.72 = 35,190.40 : x
  2. Step 2: Convert to fraction form
    68,942.80/103,424.72 = 35,190.40/x
  3. Step 3: Cross multiply
    68,942.80x = 103,424.72 × 35,190.40
  4. Step 4: Simplify right side
    68,942.80x = 3,639,557,266.69
  5. Step 5: Solve for x
    x = 3,639,557,266.69/68,942.80
  6. Step 6: Final answer
    x = 52,790.97

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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.