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Finding the Fourth Proportional to 68,103.15, 102,120.67 and 25,394.11

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Solution

The fourth proportional to 68,103.15, 102,120.67 and 25,394.11 is: 38,078.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,103.15 : 102,120.67 = 25,394.11 : x
  2. Step 2: Convert to fraction form
    68,103.15/102,120.67 = 25,394.11/x
  3. Step 3: Cross multiply
    68,103.15x = 102,120.67 × 25,394.11
  4. Step 4: Simplify right side
    68,103.15x = 2,593,263,160.85
  5. Step 5: Solve for x
    x = 2,593,263,160.85/68,103.15
  6. Step 6: Final answer
    x = 38,078.46

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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.