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Finding the Fourth Proportional to 68,409.21, 102,544.05 and 38,764.43

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Solution

The fourth proportional to 68,409.21, 102,544.05 and 38,764.43 is: 58,107.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,409.21 : 102,544.05 = 38,764.43 : x
  2. Step 2: Convert to fraction form
    68,409.21/102,544.05 = 38,764.43/x
  3. Step 3: Cross multiply
    68,409.21x = 102,544.05 × 38,764.43
  4. Step 4: Simplify right side
    68,409.21x = 3,975,061,280.79
  5. Step 5: Solve for x
    x = 3,975,061,280.79/68,409.21
  6. Step 6: Final answer
    x = 58,107.11

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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.