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Finding the Fourth Proportional to 68,814.99, 103,203.74 and 18,883.25

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Solution

The fourth proportional to 68,814.99, 103,203.74 and 18,883.25 is: 28,319.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,814.99 : 103,203.74 = 18,883.25 : x
  2. Step 2: Convert to fraction form
    68,814.99/103,203.74 = 18,883.25/x
  3. Step 3: Cross multiply
    68,814.99x = 103,203.74 × 18,883.25
  4. Step 4: Simplify right side
    68,814.99x = 1,948,821,928.94
  5. Step 5: Solve for x
    x = 1,948,821,928.94/68,814.99
  6. Step 6: Final answer
    x = 28,319.73

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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.