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Finding the Fourth Proportional to 203,639.29, 305,443.56 and 83,663.55

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Solution

The fourth proportional to 203,639.29, 305,443.56 and 83,663.55 is: 125,489.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,639.29 : 305,443.56 = 83,663.55 : x
  2. Step 2: Convert to fraction form
    203,639.29/305,443.56 = 83,663.55/x
  3. Step 3: Cross multiply
    203,639.29x = 305,443.56 × 83,663.55
  4. Step 4: Simplify right side
    203,639.29x = 25,554,491,108.78
  5. Step 5: Solve for x
    x = 25,554,491,108.78/203,639.29
  6. Step 6: Final answer
    x = 125,489.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.