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Finding the Fourth Proportional to 128,490.60, 192,743.46 and 49,605.24

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Solution

The fourth proportional to 128,490.60, 192,743.46 and 49,605.24 is: 74,410.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,490.60 : 192,743.46 = 49,605.24 : x
  2. Step 2: Convert to fraction form
    128,490.60/192,743.46 = 49,605.24/x
  3. Step 3: Cross multiply
    128,490.60x = 192,743.46 × 49,605.24
  4. Step 4: Simplify right side
    128,490.60x = 9,561,085,591.73
  5. Step 5: Solve for x
    x = 9,561,085,591.73/128,490.60
  6. Step 6: Final answer
    x = 74,410.78

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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.