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Finding the Fourth Proportional to 99,571.70, 137,410.16 and 57,134.18

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Solution

The fourth proportional to 99,571.70, 137,410.16 and 57,134.18 is: 78,845.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,571.70 : 137,410.16 = 57,134.18 : x
  2. Step 2: Convert to fraction form
    99,571.70/137,410.16 = 57,134.18/x
  3. Step 3: Cross multiply
    99,571.70x = 137,410.16 × 57,134.18
  4. Step 4: Simplify right side
    99,571.70x = 7,850,816,815.27
  5. Step 5: Solve for x
    x = 7,850,816,815.27/99,571.70
  6. Step 6: Final answer
    x = 78,845.86

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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.