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Finding the Fourth Proportional to 143,508.52, 215,262.96 and 68,611.06

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Solution

The fourth proportional to 143,508.52, 215,262.96 and 68,611.06 is: 102,916.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,508.52 : 215,262.96 = 68,611.06 : x
  2. Step 2: Convert to fraction form
    143,508.52/215,262.96 = 68,611.06/x
  3. Step 3: Cross multiply
    143,508.52x = 215,262.96 × 68,611.06
  4. Step 4: Simplify right side
    143,508.52x = 14,769,419,864.34
  5. Step 5: Solve for x
    x = 14,769,419,864.34/143,508.52
  6. Step 6: Final answer
    x = 102,916.68

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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.