Home / 279,768.16-419,711.92-90,239.18

Finding the Fourth Proportional to 279,768.16, 419,711.92 and 90,239.18

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Solution

The fourth proportional to 279,768.16, 419,711.92 and 90,239.18 is: 135,378.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,768.16 : 419,711.92 = 90,239.18 : x
  2. Step 2: Convert to fraction form
    279,768.16/419,711.92 = 90,239.18/x
  3. Step 3: Cross multiply
    279,768.16x = 419,711.92 × 90,239.18
  4. Step 4: Simplify right side
    279,768.16x = 37,874,459,497.03
  5. Step 5: Solve for x
    x = 37,874,459,497.03/279,768.16
  6. Step 6: Final answer
    x = 135,378.02

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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.