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Finding the Fourth Proportional to 128,545.20, 192,760.20 and 49,633.20

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Solution

The fourth proportional to 128,545.20, 192,760.20 and 49,633.20 is: 74,427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,545.20 : 192,760.20 = 49,633.20 : x
  2. Step 2: Convert to fraction form
    128,545.20/192,760.20 = 49,633.20/x
  3. Step 3: Cross multiply
    128,545.20x = 192,760.20 × 49,633.20
  4. Step 4: Simplify right side
    128,545.20x = 9,567,305,558.64
  5. Step 5: Solve for x
    x = 9,567,305,558.64/128,545.20
  6. Step 6: Final answer
    x = 74,427.56

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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.