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Finding the Fourth Proportional to 128,571.92, 192,870.56 and 44,321.00

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Solution

The fourth proportional to 128,571.92, 192,870.56 and 44,321.00 is: 66,485.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,571.92 : 192,870.56 = 44,321.00 : x
  2. Step 2: Convert to fraction form
    128,571.92/192,870.56 = 44,321.00/x
  3. Step 3: Cross multiply
    128,571.92x = 192,870.56 × 44,321.00
  4. Step 4: Simplify right side
    128,571.92x = 8,548,214,903.80
  5. Step 5: Solve for x
    x = 8,548,214,903.80/128,571.92
  6. Step 6: Final answer
    x = 66,485.86

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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.