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Finding the Fourth Proportional to 68,346.82, 102,523.30 and 20,958.44

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Solution

The fourth proportional to 68,346.82, 102,523.30 and 20,958.44 is: 31,438.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,346.82 : 102,523.30 = 20,958.44 : x
  2. Step 2: Convert to fraction form
    68,346.82/102,523.30 = 20,958.44/x
  3. Step 3: Cross multiply
    68,346.82x = 102,523.30 × 20,958.44
  4. Step 4: Simplify right side
    68,346.82x = 2,148,728,431.65
  5. Step 5: Solve for x
    x = 2,148,728,431.65/68,346.82
  6. Step 6: Final answer
    x = 31,438.60

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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.