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Finding the Fourth Proportional to 128,223.69, 192,163.59 and 99,794.97

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Solution

The fourth proportional to 128,223.69, 192,163.59 and 99,794.97 is: 149,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,223.69 : 192,163.59 = 99,794.97 : x
  2. Step 2: Convert to fraction form
    128,223.69/192,163.59 = 99,794.97/x
  3. Step 3: Cross multiply
    128,223.69x = 192,163.59 × 99,794.97
  4. Step 4: Simplify right side
    128,223.69x = 19,176,959,699.14
  5. Step 5: Solve for x
    x = 19,176,959,699.14/128,223.69
  6. Step 6: Final answer
    x = 149,558.64

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1.5x scale

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.