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Finding the Fourth Proportional to 128,356.81, 192,548.07 and 44,105.86

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Solution

The fourth proportional to 128,356.81, 192,548.07 and 44,105.86 is: 66,163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,356.81 : 192,548.07 = 44,105.86 : x
  2. Step 2: Convert to fraction form
    128,356.81/192,548.07 = 44,105.86/x
  3. Step 3: Cross multiply
    128,356.81x = 192,548.07 × 44,105.86
  4. Step 4: Simplify right side
    128,356.81x = 8,492,498,218.69
  5. Step 5: Solve for x
    x = 8,492,498,218.69/128,356.81
  6. Step 6: Final answer
    x = 66,163.21

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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.