Home / 279,976.32-419,878.20-80,243.16

Finding the Fourth Proportional to 279,976.32, 419,878.20 and 80,243.16

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Solution

The fourth proportional to 279,976.32, 419,878.20 and 80,243.16 is: 120,340.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,976.32 : 419,878.20 = 80,243.16 : x
  2. Step 2: Convert to fraction form
    279,976.32/419,878.20 = 80,243.16/x
  3. Step 3: Cross multiply
    279,976.32x = 419,878.20 × 80,243.16
  4. Step 4: Simplify right side
    279,976.32x = 33,692,353,583.11
  5. Step 5: Solve for x
    x = 33,692,353,583.11/279,976.32
  6. Step 6: Final answer
    x = 120,340.01

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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.