Home / 205,719.85-308,579.78-100,743.85

Finding the Fourth Proportional to 205,719.85, 308,579.78 and 100,743.85

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Solution

The fourth proportional to 205,719.85, 308,579.78 and 100,743.85 is: 151,115.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,719.85 : 308,579.78 = 100,743.85 : x
  2. Step 2: Convert to fraction form
    205,719.85/308,579.78 = 100,743.85/x
  3. Step 3: Cross multiply
    205,719.85x = 308,579.78 × 100,743.85
  4. Step 4: Simplify right side
    205,719.85x = 31,087,514,565.63
  5. Step 5: Solve for x
    x = 31,087,514,565.63/205,719.85
  6. Step 6: Final answer
    x = 151,115.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.