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Finding the Fourth Proportional to 69,589.71, 104,385.15 and 19,668.69

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Solution

The fourth proportional to 69,589.71, 104,385.15 and 19,668.69 is: 29,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,589.71 : 104,385.15 = 19,668.69 : x
  2. Step 2: Convert to fraction form
    69,589.71/104,385.15 = 19,668.69/x
  3. Step 3: Cross multiply
    69,589.71x = 104,385.15 × 19,668.69
  4. Step 4: Simplify right side
    69,589.71x = 2,053,119,155.95
  5. Step 5: Solve for x
    x = 2,053,119,155.95/69,589.71
  6. Step 6: Final answer
    x = 29,503.20

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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.