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Finding the Fourth Proportional to 276,081.80, 414,131.90 and 76,385.48

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Solution

The fourth proportional to 276,081.80, 414,131.90 and 76,385.48 is: 114,580.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,081.80 : 414,131.90 = 76,385.48 : x
  2. Step 2: Convert to fraction form
    276,081.80/414,131.90 = 76,385.48/x
  3. Step 3: Cross multiply
    276,081.80x = 414,131.90 × 76,385.48
  4. Step 4: Simplify right side
    276,081.80x = 31,633,663,964.81
  5. Step 5: Solve for x
    x = 31,633,663,964.81/276,081.80
  6. Step 6: Final answer
    x = 114,580.77

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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.