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Finding the Fourth Proportional to 220,806.64, 331,215.42 and 80,565.25

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Solution

The fourth proportional to 220,806.64, 331,215.42 and 80,565.25 is: 120,849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,806.64 : 331,215.42 = 80,565.25 : x
  2. Step 2: Convert to fraction form
    220,806.64/331,215.42 = 80,565.25/x
  3. Step 3: Cross multiply
    220,806.64x = 331,215.42 × 80,565.25
  4. Step 4: Simplify right side
    220,806.64x = 26,684,453,116.16
  5. Step 5: Solve for x
    x = 26,684,453,116.16/220,806.64
  6. Step 6: Final answer
    x = 120,849.87

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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.