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Finding the Fourth Proportional to 220,979.88, 304,952.31 and 120,377.88

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Solution

The fourth proportional to 220,979.88, 304,952.31 and 120,377.88 is: 166,121.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,979.88 : 304,952.31 = 120,377.88 : x
  2. Step 2: Convert to fraction form
    220,979.88/304,952.31 = 120,377.88/x
  3. Step 3: Cross multiply
    220,979.88x = 304,952.31 × 120,377.88
  4. Step 4: Simplify right side
    220,979.88x = 36,709,512,578.90
  5. Step 5: Solve for x
    x = 36,709,512,578.90/220,979.88
  6. Step 6: Final answer
    x = 166,121.52

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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.