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Finding the Fourth Proportional to 69,213.96, 103,809.18 and 19,299.04

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Solution

The fourth proportional to 69,213.96, 103,809.18 and 19,299.04 is: 28,945.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,213.96 : 103,809.18 = 19,299.04 : x
  2. Step 2: Convert to fraction form
    69,213.96/103,809.18 = 19,299.04/x
  3. Step 3: Cross multiply
    69,213.96x = 103,809.18 × 19,299.04
  4. Step 4: Simplify right side
    69,213.96x = 2,003,417,517.19
  5. Step 5: Solve for x
    x = 2,003,417,517.19/69,213.96
  6. Step 6: Final answer
    x = 28,945.28

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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.