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Finding the Fourth Proportional to 68,458.98, 102,603.66 and 38,786.88

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Solution

The fourth proportional to 68,458.98, 102,603.66 and 38,786.88 is: 58,132.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,458.98 : 102,603.66 = 38,786.88 : x
  2. Step 2: Convert to fraction form
    68,458.98/102,603.66 = 38,786.88/x
  3. Step 3: Cross multiply
    68,458.98x = 102,603.66 × 38,786.88
  4. Step 4: Simplify right side
    68,458.98x = 3,979,675,847.98
  5. Step 5: Solve for x
    x = 3,979,675,847.98/68,458.98
  6. Step 6: Final answer
    x = 58,132.27

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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.