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Finding the Fourth Proportional to 190,321.92, 285,487.88 and 55,380.54

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Solution

The fourth proportional to 190,321.92, 285,487.88 and 55,380.54 is: 83,072.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,321.92 : 285,487.88 = 55,380.54 : x
  2. Step 2: Convert to fraction form
    190,321.92/285,487.88 = 55,380.54/x
  3. Step 3: Cross multiply
    190,321.92x = 285,487.88 × 55,380.54
  4. Step 4: Simplify right side
    190,321.92x = 15,810,473,827.83
  5. Step 5: Solve for x
    x = 15,810,473,827.83/190,321.92
  6. Step 6: Final answer
    x = 83,072.27

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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.