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Finding the Fourth Proportional to 220,979.20, 304,951.20 and 120,377.20

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Solution

The fourth proportional to 220,979.20, 304,951.20 and 120,377.20 is: 166,120.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,979.20 : 304,951.20 = 120,377.20 : x
  2. Step 2: Convert to fraction form
    220,979.20/304,951.20 = 120,377.20/x
  3. Step 3: Cross multiply
    220,979.20x = 304,951.20 × 120,377.20
  4. Step 4: Simplify right side
    220,979.20x = 36,709,171,592.64
  5. Step 5: Solve for x
    x = 36,709,171,592.64/220,979.20
  6. Step 6: Final answer
    x = 166,120.48

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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.