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Finding the Fourth Proportional to 220,619.56, 330,812.70 and 80,366.44

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Solution

The fourth proportional to 220,619.56, 330,812.70 and 80,366.44 is: 120,507.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,619.56 : 330,812.70 = 80,366.44 : x
  2. Step 2: Convert to fraction form
    220,619.56/330,812.70 = 80,366.44/x
  3. Step 3: Cross multiply
    220,619.56x = 330,812.70 × 80,366.44
  4. Step 4: Simplify right side
    220,619.56x = 26,586,239,005.79
  5. Step 5: Solve for x
    x = 26,586,239,005.79/220,619.56
  6. Step 6: Final answer
    x = 120,507.17

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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.