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Finding the Fourth Proportional to 220,803.13, 331,210.16 and 80,561.75

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Solution

The fourth proportional to 220,803.13, 331,210.16 and 80,561.75 is: 120,844.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,803.13 : 331,210.16 = 80,561.75 : x
  2. Step 2: Convert to fraction form
    220,803.13/331,210.16 = 80,561.75/x
  3. Step 3: Cross multiply
    220,803.13x = 331,210.16 × 80,561.75
  4. Step 4: Simplify right side
    220,803.13x = 26,682,869,704.57
  5. Step 5: Solve for x
    x = 26,682,869,704.57/220,803.13
  6. Step 6: Final answer
    x = 120,844.62

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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.