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Finding the Fourth Proportional to 76,793.54, 105,917.83 and 68,190.12

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Solution

The fourth proportional to 76,793.54, 105,917.83 and 68,190.12 is: 94,051.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,793.54 : 105,917.83 = 68,190.12 : x
  2. Step 2: Convert to fraction form
    76,793.54/105,917.83 = 68,190.12/x
  3. Step 3: Cross multiply
    76,793.54x = 105,917.83 × 68,190.12
  4. Step 4: Simplify right side
    76,793.54x = 7,222,549,367.36
  5. Step 5: Solve for x
    x = 7,222,549,367.36/76,793.54
  6. Step 6: Final answer
    x = 94,051.53

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1.5x scale

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.