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Finding the Fourth Proportional to 215,995.45, 298,067.97 and 120,499.69

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Solution

The fourth proportional to 215,995.45, 298,067.97 and 120,499.69 is: 166,286.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,995.45 : 298,067.97 = 120,499.69 : x
  2. Step 2: Convert to fraction form
    215,995.45/298,067.97 = 120,499.69/x
  3. Step 3: Cross multiply
    215,995.45x = 298,067.97 × 120,499.69
  4. Step 4: Simplify right side
    215,995.45x = 35,917,097,983.93
  5. Step 5: Solve for x
    x = 35,917,097,983.93/215,995.45
  6. Step 6: Final answer
    x = 166,286.36

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1.5x scale

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.