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Finding the Fourth Proportional to 120,236.18, 165,930.48 and 65,792.03

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Solution

The fourth proportional to 120,236.18, 165,930.48 and 65,792.03 is: 90,795.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,236.18 : 165,930.48 = 65,792.03 : x
  2. Step 2: Convert to fraction form
    120,236.18/165,930.48 = 65,792.03/x
  3. Step 3: Cross multiply
    120,236.18x = 165,930.48 × 65,792.03
  4. Step 4: Simplify right side
    120,236.18x = 10,916,902,288.42
  5. Step 5: Solve for x
    x = 10,916,902,288.42/120,236.18
  6. Step 6: Final answer
    x = 90,795.49

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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.