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Finding the Fourth Proportional to 113,843.92, 170,712.64 and 66,472.72

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Solution

The fourth proportional to 113,843.92, 170,712.64 and 66,472.72 is: 99,677.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,843.92 : 170,712.64 = 66,472.72 : x
  2. Step 2: Convert to fraction form
    113,843.92/170,712.64 = 66,472.72/x
  3. Step 3: Cross multiply
    113,843.92x = 170,712.64 × 66,472.72
  4. Step 4: Simplify right side
    113,843.92x = 11,347,733,519.18
  5. Step 5: Solve for x
    x = 11,347,733,519.18/113,843.92
  6. Step 6: Final answer
    x = 99,677.99

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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.