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Finding the Fourth Proportional to 68,469.11, 102,703.66 and 25,782.55

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Solution

The fourth proportional to 68,469.11, 102,703.66 and 25,782.55 is: 38,673.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,469.11 : 102,703.66 = 25,782.55 : x
  2. Step 2: Convert to fraction form
    68,469.11/102,703.66 = 25,782.55/x
  3. Step 3: Cross multiply
    68,469.11x = 102,703.66 × 25,782.55
  4. Step 4: Simplify right side
    68,469.11x = 2,647,961,927.92
  5. Step 5: Solve for x
    x = 2,647,961,927.92/68,469.11
  6. Step 6: Final answer
    x = 38,673.82

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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.