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Finding the Fourth Proportional to 68,449.38, 102,683.96 and 21,068.54

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Solution

The fourth proportional to 68,449.38, 102,683.96 and 21,068.54 is: 31,605.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,449.38 : 102,683.96 = 21,068.54 : x
  2. Step 2: Convert to fraction form
    68,449.38/102,683.96 = 21,068.54/x
  3. Step 3: Cross multiply
    68,449.38x = 102,683.96 × 21,068.54
  4. Step 4: Simplify right side
    68,449.38x = 2,163,400,499.86
  5. Step 5: Solve for x
    x = 2,163,400,499.86/68,449.38
  6. Step 6: Final answer
    x = 31,605.85

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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.