Home / 279,945.82-419,670.09-109,128.16

Finding the Fourth Proportional to 279,945.82, 419,670.09 and 109,128.16

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Solution

The fourth proportional to 279,945.82, 419,670.09 and 109,128.16 is: 163,595.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,945.82 : 419,670.09 = 109,128.16 : x
  2. Step 2: Convert to fraction form
    279,945.82/419,670.09 = 109,128.16/x
  3. Step 3: Cross multiply
    279,945.82x = 419,670.09 × 109,128.16
  4. Step 4: Simplify right side
    279,945.82x = 45,797,824,728.73
  5. Step 5: Solve for x
    x = 45,797,824,728.73/279,945.82
  6. Step 6: Final answer
    x = 163,595.32

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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.