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Finding the Fourth Proportional to 221,653.67, 305,893.87 and 126,191.12

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Solution

The fourth proportional to 221,653.67, 305,893.87 and 126,191.12 is: 174,150.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,653.67 : 305,893.87 = 126,191.12 : x
  2. Step 2: Convert to fraction form
    221,653.67/305,893.87 = 126,191.12/x
  3. Step 3: Cross multiply
    221,653.67x = 305,893.87 × 126,191.12
  4. Step 4: Simplify right side
    221,653.67x = 38,601,088,211.49
  5. Step 5: Solve for x
    x = 38,601,088,211.49/221,653.67
  6. Step 6: Final answer
    x = 174,150.46

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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.