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Finding the Fourth Proportional to 68,879.50, 103,336.59 and 19,631.50

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Solution

The fourth proportional to 68,879.50, 103,336.59 and 19,631.50 is: 29,452.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,879.50 : 103,336.59 = 19,631.50 : x
  2. Step 2: Convert to fraction form
    68,879.50/103,336.59 = 19,631.50/x
  3. Step 3: Cross multiply
    68,879.50x = 103,336.59 × 19,631.50
  4. Step 4: Simplify right side
    68,879.50x = 2,028,652,266.59
  5. Step 5: Solve for x
    x = 2,028,652,266.59/68,879.50
  6. Step 6: Final answer
    x = 29,452.19

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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.