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Finding the Fourth Proportional to 230,884.73, 318,617.81 and 128,911.76

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Solution

The fourth proportional to 230,884.73, 318,617.81 and 128,911.76 is: 177,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,884.73 : 318,617.81 = 128,911.76 : x
  2. Step 2: Convert to fraction form
    230,884.73/318,617.81 = 128,911.76/x
  3. Step 3: Cross multiply
    230,884.73x = 318,617.81 × 128,911.76
  4. Step 4: Simplify right side
    230,884.73x = 41,073,581,383.64
  5. Step 5: Solve for x
    x = 41,073,581,383.64/230,884.73
  6. Step 6: Final answer
    x = 177,896.48

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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.