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Finding the Fourth Proportional to 85,393.70, 127,942.92 and 66,424.22

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Solution

The fourth proportional to 85,393.70, 127,942.92 and 66,424.22 is: 99,521.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,393.70 : 127,942.92 = 66,424.22 : x
  2. Step 2: Convert to fraction form
    85,393.70/127,942.92 = 66,424.22/x
  3. Step 3: Cross multiply
    85,393.70x = 127,942.92 × 66,424.22
  4. Step 4: Simplify right side
    85,393.70x = 8,498,508,665.52
  5. Step 5: Solve for x
    x = 8,498,508,665.52/85,393.70
  6. Step 6: Final answer
    x = 99,521.49

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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.