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Finding the Fourth Proportional to 67,188.94, 100,797.98 and 20,440.60

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Solution

The fourth proportional to 67,188.94, 100,797.98 and 20,440.60 is: 30,665.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,188.94 : 100,797.98 = 20,440.60 : x
  2. Step 2: Convert to fraction form
    67,188.94/100,797.98 = 20,440.60/x
  3. Step 3: Cross multiply
    67,188.94x = 100,797.98 × 20,440.60
  4. Step 4: Simplify right side
    67,188.94x = 2,060,370,989.09
  5. Step 5: Solve for x
    x = 2,060,370,989.09/67,188.94
  6. Step 6: Final answer
    x = 30,665.33

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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.