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Finding the Fourth Proportional to 159,940, 220,736.64 and 92,872

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Solution

The fourth proportional to 159,940, 220,736.64 and 92,872 is: 128,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,940 : 220,736.64 = 92,872 : x
  2. Step 2: Convert to fraction form
    159,940/220,736.64 = 92,872/x
  3. Step 3: Cross multiply
    159,940x = 220,736.64 × 92,872
  4. Step 4: Simplify right side
    159,940x = 20,500,253,230.08
  5. Step 5: Solve for x
    x = 20,500,253,230.08/159,940
  6. Step 6: Final answer
    x = 128,174.65

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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.