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Finding the Fourth Proportional to 128,355.92, 192,485.94 and 44,092.16

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Solution

The fourth proportional to 128,355.92, 192,485.94 and 44,092.16 is: 66,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,355.92 : 192,485.94 = 44,092.16 : x
  2. Step 2: Convert to fraction form
    128,355.92/192,485.94 = 44,092.16/x
  3. Step 3: Cross multiply
    128,355.92x = 192,485.94 × 44,092.16
  4. Step 4: Simplify right side
    128,355.92x = 8,487,120,864.23
  5. Step 5: Solve for x
    x = 8,487,120,864.23/128,355.92
  6. Step 6: Final answer
    x = 66,121.77

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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.