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Finding the Fourth Proportional to 220,728.53, 331,142.16 and 80,487.16

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Solution

The fourth proportional to 220,728.53, 331,142.16 and 80,487.16 is: 120,748.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,728.53 : 331,142.16 = 80,487.16 : x
  2. Step 2: Convert to fraction form
    220,728.53/331,142.16 = 80,487.16/x
  3. Step 3: Cross multiply
    220,728.53x = 331,142.16 × 80,487.16
  4. Step 4: Simplify right side
    220,728.53x = 26,652,692,014.67
  5. Step 5: Solve for x
    x = 26,652,692,014.67/220,728.53
  6. Step 6: Final answer
    x = 120,748.74

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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.