Home / 279,958.09-419,688.46-109,140.43

Finding the Fourth Proportional to 279,958.09, 419,688.46 and 109,140.43

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Solution

The fourth proportional to 279,958.09, 419,688.46 and 109,140.43 is: 163,613.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,958.09 : 419,688.46 = 109,140.43 : x
  2. Step 2: Convert to fraction form
    279,958.09/419,688.46 = 109,140.43/x
  3. Step 3: Cross multiply
    279,958.09x = 419,688.46 × 109,140.43
  4. Step 4: Simplify right side
    279,958.09x = 45,804,978,990.44
  5. Step 5: Solve for x
    x = 45,804,978,990.44/279,958.09
  6. Step 6: Final answer
    x = 163,613.70

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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.