Home / 279,764.16-419,705.91-90,235.17

Finding the Fourth Proportional to 279,764.16, 419,705.91 and 90,235.17

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Solution

The fourth proportional to 279,764.16, 419,705.91 and 90,235.17 is: 135,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,764.16 : 419,705.91 = 90,235.17 : x
  2. Step 2: Convert to fraction form
    279,764.16/419,705.91 = 90,235.17/x
  3. Step 3: Cross multiply
    279,764.16x = 419,705.91 × 90,235.17
  4. Step 4: Simplify right side
    279,764.16x = 37,872,234,138.85
  5. Step 5: Solve for x
    x = 37,872,234,138.85/279,764.16
  6. Step 6: Final answer
    x = 135,372.00

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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.