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Finding the Fourth Proportional to 140,358.40, 193,692.27 and 76,694.83

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Solution

The fourth proportional to 140,358.40, 193,692.27 and 76,694.83 is: 105,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,358.40 : 193,692.27 = 76,694.83 : x
  2. Step 2: Convert to fraction form
    140,358.40/193,692.27 = 76,694.83/x
  3. Step 3: Cross multiply
    140,358.40x = 193,692.27 × 76,694.83
  4. Step 4: Simplify right side
    140,358.40x = 14,855,195,719.96
  5. Step 5: Solve for x
    x = 14,855,195,719.96/140,358.40
  6. Step 6: Final answer
    x = 105,837.60

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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.