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Finding the Fourth Proportional to 143,497.78, 215,149.26 and 80,361.32

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Solution

The fourth proportional to 143,497.78, 215,149.26 and 80,361.32 is: 120,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,497.78 : 215,149.26 = 80,361.32 : x
  2. Step 2: Convert to fraction form
    143,497.78/215,149.26 = 80,361.32/x
  3. Step 3: Cross multiply
    143,497.78x = 215,149.26 × 80,361.32
  4. Step 4: Simplify right side
    143,497.78x = 17,289,677,756.23
  5. Step 5: Solve for x
    x = 17,289,677,756.23/143,497.78
  6. Step 6: Final answer
    x = 120,487.43

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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.