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Finding the Fourth Proportional to 72,578.44, 108,880.42 and 33,139.54

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Solution

The fourth proportional to 72,578.44, 108,880.42 and 33,139.54 is: 49,715.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578.44 : 108,880.42 = 33,139.54 : x
  2. Step 2: Convert to fraction form
    72,578.44/108,880.42 = 33,139.54/x
  3. Step 3: Cross multiply
    72,578.44x = 108,880.42 × 33,139.54
  4. Step 4: Simplify right side
    72,578.44x = 3,608,247,033.81
  5. Step 5: Solve for x
    x = 3,608,247,033.81/72,578.44
  6. Step 6: Final answer
    x = 49,715.14

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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.