Home / 217,917.52-300,719.22-121,120.90

Finding the Fourth Proportional to 217,917.52, 300,719.22 and 121,120.90

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Solution

The fourth proportional to 217,917.52, 300,719.22 and 121,120.90 is: 167,142.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,917.52 : 300,719.22 = 121,120.90 : x
  2. Step 2: Convert to fraction form
    217,917.52/300,719.22 = 121,120.90/x
  3. Step 3: Cross multiply
    217,917.52x = 300,719.22 × 121,120.90
  4. Step 4: Simplify right side
    217,917.52x = 36,423,382,573.70
  5. Step 5: Solve for x
    x = 36,423,382,573.70/217,917.52
  6. Step 6: Final answer
    x = 167,142.97

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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.