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Finding the Fourth Proportional to 67,043.70, 100,456.20 and 57,639.60

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Solution

The fourth proportional to 67,043.70, 100,456.20 and 57,639.60 is: 86,365.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,043.70 : 100,456.20 = 57,639.60 : x
  2. Step 2: Convert to fraction form
    67,043.70/100,456.20 = 57,639.60/x
  3. Step 3: Cross multiply
    67,043.70x = 100,456.20 × 57,639.60
  4. Step 4: Simplify right side
    67,043.70x = 5,790,255,185.52
  5. Step 5: Solve for x
    x = 5,790,255,185.52/67,043.70
  6. Step 6: Final answer
    x = 86,365.39

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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.