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Finding the Fourth Proportional to 68,364.72, 102,538.85 and 18,440.96

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Solution

The fourth proportional to 68,364.72, 102,538.85 and 18,440.96 is: 27,659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,364.72 : 102,538.85 = 18,440.96 : x
  2. Step 2: Convert to fraction form
    68,364.72/102,538.85 = 18,440.96/x
  3. Step 3: Cross multiply
    68,364.72x = 102,538.85 × 18,440.96
  4. Step 4: Simplify right side
    68,364.72x = 1,890,914,226.40
  5. Step 5: Solve for x
    x = 1,890,914,226.40/68,364.72
  6. Step 6: Final answer
    x = 27,659.21

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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.