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Finding the Fourth Proportional to 143,644.05, 214,941.17 and 84,507.57

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Solution

The fourth proportional to 143,644.05, 214,941.17 and 84,507.57 is: 126,452.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,644.05 : 214,941.17 = 84,507.57 : x
  2. Step 2: Convert to fraction form
    143,644.05/214,941.17 = 84,507.57/x
  3. Step 3: Cross multiply
    143,644.05x = 214,941.17 × 84,507.57
  4. Step 4: Simplify right side
    143,644.05x = 18,164,156,180.93
  5. Step 5: Solve for x
    x = 18,164,156,180.93/143,644.05
  6. Step 6: Final answer
    x = 126,452.55

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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.