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Finding the Fourth Proportional to 68,859.29, 103,289.40 and 18,944.66

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Solution

The fourth proportional to 68,859.29, 103,289.40 and 18,944.66 is: 28,417.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,859.29 : 103,289.40 = 18,944.66 : x
  2. Step 2: Convert to fraction form
    68,859.29/103,289.40 = 18,944.66/x
  3. Step 3: Cross multiply
    68,859.29x = 103,289.40 × 18,944.66
  4. Step 4: Simplify right side
    68,859.29x = 1,956,782,469.88
  5. Step 5: Solve for x
    x = 1,956,782,469.88/68,859.29
  6. Step 6: Final answer
    x = 28,417.12

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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.