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Finding the Fourth Proportional to 69,581.20, 104,366.20 and 19,659.28

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Solution

The fourth proportional to 69,581.20, 104,366.20 and 19,659.28 is: 29,487.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,581.20 : 104,366.20 = 19,659.28 : x
  2. Step 2: Convert to fraction form
    69,581.20/104,366.20 = 19,659.28/x
  3. Step 3: Cross multiply
    69,581.20x = 104,366.20 × 19,659.28
  4. Step 4: Simplify right side
    69,581.20x = 2,051,764,348.34
  5. Step 5: Solve for x
    x = 2,051,764,348.34/69,581.20
  6. Step 6: Final answer
    x = 29,487.34

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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.