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Finding the Fourth Proportional to 71,078.92, 106,640.28 and 51,133.48

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Solution

The fourth proportional to 71,078.92, 106,640.28 and 51,133.48 is: 76,715.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,078.92 : 106,640.28 = 51,133.48 : x
  2. Step 2: Convert to fraction form
    71,078.92/106,640.28 = 51,133.48/x
  3. Step 3: Cross multiply
    71,078.92x = 106,640.28 × 51,133.48
  4. Step 4: Simplify right side
    71,078.92x = 5,452,888,624.57
  5. Step 5: Solve for x
    x = 5,452,888,624.57/71,078.92
  6. Step 6: Final answer
    x = 76,715.97

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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.