Home / 143,872.10-215,516.55-81,469.70

Finding the Fourth Proportional to 143,872.10, 215,516.55 and 81,469.70

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Solution

The fourth proportional to 143,872.10, 215,516.55 and 81,469.70 is: 122,039.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,872.10 : 215,516.55 = 81,469.70 : x
  2. Step 2: Convert to fraction form
    143,872.10/215,516.55 = 81,469.70/x
  3. Step 3: Cross multiply
    143,872.10x = 215,516.55 × 81,469.70
  4. Step 4: Simplify right side
    143,872.10x = 17,558,068,673.54
  5. Step 5: Solve for x
    x = 17,558,068,673.54/143,872.10
  6. Step 6: Final answer
    x = 122,039.43

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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.