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Finding the Fourth Proportional to 68,992.56, 103,226.40 and 42,631.92

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Solution

The fourth proportional to 68,992.56, 103,226.40 and 42,631.92 is: 63,785.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,992.56 : 103,226.40 = 42,631.92 : x
  2. Step 2: Convert to fraction form
    68,992.56/103,226.40 = 42,631.92/x
  3. Step 3: Cross multiply
    68,992.56x = 103,226.40 × 42,631.92
  4. Step 4: Simplify right side
    68,992.56x = 4,400,739,626.69
  5. Step 5: Solve for x
    x = 4,400,739,626.69/68,992.56
  6. Step 6: Final answer
    x = 63,785.71

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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.