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Finding the Fourth Proportional to 68,028.26, 101,872.67 and 42,992.78

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Solution

The fourth proportional to 68,028.26, 101,872.67 and 42,992.78 is: 64,381.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,028.26 : 101,872.67 = 42,992.78 : x
  2. Step 2: Convert to fraction form
    68,028.26/101,872.67 = 42,992.78/x
  3. Step 3: Cross multiply
    68,028.26x = 101,872.67 × 42,992.78
  4. Step 4: Simplify right side
    68,028.26x = 4,379,788,565.00
  5. Step 5: Solve for x
    x = 4,379,788,565.00/68,028.26
  6. Step 6: Final answer
    x = 64,381.90

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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.