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Finding the Fourth Proportional to 128,481.84, 192,772.44 and 49,574.16

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Solution

The fourth proportional to 128,481.84, 192,772.44 and 49,574.16 is: 74,380.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,481.84 : 192,772.44 = 49,574.16 : x
  2. Step 2: Convert to fraction form
    128,481.84/192,772.44 = 49,574.16/x
  3. Step 3: Cross multiply
    128,481.84x = 192,772.44 × 49,574.16
  4. Step 4: Simplify right side
    128,481.84x = 9,556,531,784.15
  5. Step 5: Solve for x
    x = 9,556,531,784.15/128,481.84
  6. Step 6: Final answer
    x = 74,380.41

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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.