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Finding the Fourth Proportional to 221,699.56, 305,969.79 and 126,190.84

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Solution

The fourth proportional to 221,699.56, 305,969.79 and 126,190.84 is: 174,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,699.56 : 305,969.79 = 126,190.84 : x
  2. Step 2: Convert to fraction form
    221,699.56/305,969.79 = 126,190.84/x
  3. Step 3: Cross multiply
    221,699.56x = 305,969.79 × 126,190.84
  4. Step 4: Simplify right side
    221,699.56x = 38,610,584,814.72
  5. Step 5: Solve for x
    x = 38,610,584,814.72/221,699.56
  6. Step 6: Final answer
    x = 174,157.25

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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.