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Finding the Fourth Proportional to 85,797.12, 118,359.98 and 53,983.56

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Solution

The fourth proportional to 85,797.12, 118,359.98 and 53,983.56 is: 74,472.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,797.12 : 118,359.98 = 53,983.56 : x
  2. Step 2: Convert to fraction form
    85,797.12/118,359.98 = 53,983.56/x
  3. Step 3: Cross multiply
    85,797.12x = 118,359.98 × 53,983.56
  4. Step 4: Simplify right side
    85,797.12x = 6,389,493,761.96
  5. Step 5: Solve for x
    x = 6,389,493,761.96/85,797.12
  6. Step 6: Final answer
    x = 74,472.12

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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.