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Finding the Fourth Proportional to 120,084, 165,715.92 and 67,092

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Solution

The fourth proportional to 120,084, 165,715.92 and 67,092 is: 92,586.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,084 : 165,715.92 = 67,092 : x
  2. Step 2: Convert to fraction form
    120,084/165,715.92 = 67,092/x
  3. Step 3: Cross multiply
    120,084x = 165,715.92 × 67,092
  4. Step 4: Simplify right side
    120,084x = 11,118,212,504.64
  5. Step 5: Solve for x
    x = 11,118,212,504.64/120,084
  6. Step 6: Final answer
    x = 92,586.96

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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.