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Finding the Fourth Proportional to 69,859.59, 104,790.35 and 19,939.67

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Solution

The fourth proportional to 69,859.59, 104,790.35 and 19,939.67 is: 29,909.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,859.59 : 104,790.35 = 19,939.67 : x
  2. Step 2: Convert to fraction form
    69,859.59/104,790.35 = 19,939.67/x
  3. Step 3: Cross multiply
    69,859.59x = 104,790.35 × 19,939.67
  4. Step 4: Simplify right side
    69,859.59x = 2,089,485,310.01
  5. Step 5: Solve for x
    x = 2,089,485,310.01/69,859.59
  6. Step 6: Final answer
    x = 29,909.78

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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.