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Finding the Fourth Proportional to 281,311.20, 421,855.63 and 91,724.96

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Solution

The fourth proportional to 281,311.20, 421,855.63 and 91,724.96 is: 137,551.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,311.20 : 421,855.63 = 91,724.96 : x
  2. Step 2: Convert to fraction form
    281,311.20/421,855.63 = 91,724.96/x
  3. Step 3: Cross multiply
    281,311.20x = 421,855.63 × 91,724.96
  4. Step 4: Simplify right side
    281,311.20x = 38,694,691,612.85
  5. Step 5: Solve for x
    x = 38,694,691,612.85/281,311.20
  6. Step 6: Final answer
    x = 137,551.19

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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.