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Finding the Fourth Proportional to 143,215.92, 214,662.42 and 68,274.72

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Solution

The fourth proportional to 143,215.92, 214,662.42 and 68,274.72 is: 102,335.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,215.92 : 214,662.42 = 68,274.72 : x
  2. Step 2: Convert to fraction form
    143,215.92/214,662.42 = 68,274.72/x
  3. Step 3: Cross multiply
    143,215.92x = 214,662.42 × 68,274.72
  4. Step 4: Simplify right side
    143,215.92x = 14,656,016,620.02
  5. Step 5: Solve for x
    x = 14,656,016,620.02/143,215.92
  6. Step 6: Final answer
    x = 102,335.11

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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.