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Finding the Fourth Proportional to 68,021.88, 101,928.96 and 28,557.54

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Solution

The fourth proportional to 68,021.88, 101,928.96 and 28,557.54 is: 42,792.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,021.88 : 101,928.96 = 28,557.54 : x
  2. Step 2: Convert to fraction form
    68,021.88/101,928.96 = 28,557.54/x
  3. Step 3: Cross multiply
    68,021.88x = 101,928.96 × 28,557.54
  4. Step 4: Simplify right side
    68,021.88x = 2,910,840,352.36
  5. Step 5: Solve for x
    x = 2,910,840,352.36/68,021.88
  6. Step 6: Final answer
    x = 42,792.71

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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.