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Finding the Fourth Proportional to 143,644.70, 215,467.14 and 68,747.24

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Solution

The fourth proportional to 143,644.70, 215,467.14 and 68,747.24 is: 103,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,644.70 : 215,467.14 = 68,747.24 : x
  2. Step 2: Convert to fraction form
    143,644.70/215,467.14 = 68,747.24/x
  3. Step 3: Cross multiply
    143,644.70x = 215,467.14 × 68,747.24
  4. Step 4: Simplify right side
    143,644.70x = 14,812,771,185.69
  5. Step 5: Solve for x
    x = 14,812,771,185.69/143,644.70
  6. Step 6: Final answer
    x = 103,120.90

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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.