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Finding the Fourth Proportional to 190,866.56, 263,249.88 and 129,659.96

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Solution

The fourth proportional to 190,866.56, 263,249.88 and 129,659.96 is: 178,831.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,866.56 : 263,249.88 = 129,659.96 : x
  2. Step 2: Convert to fraction form
    190,866.56/263,249.88 = 129,659.96/x
  3. Step 3: Cross multiply
    190,866.56x = 263,249.88 × 129,659.96
  4. Step 4: Simplify right side
    190,866.56x = 34,132,968,910.80
  5. Step 5: Solve for x
    x = 34,132,968,910.80/190,866.56
  6. Step 6: Final answer
    x = 178,831.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.