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Finding the Fourth Proportional to 69,678.61, 104,517.88 and 19,759.14

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Solution

The fourth proportional to 69,678.61, 104,517.88 and 19,759.14 is: 29,638.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,678.61 : 104,517.88 = 19,759.14 : x
  2. Step 2: Convert to fraction form
    69,678.61/104,517.88 = 19,759.14/x
  3. Step 3: Cross multiply
    69,678.61x = 104,517.88 × 19,759.14
  4. Step 4: Simplify right side
    69,678.61x = 2,065,183,374.03
  5. Step 5: Solve for x
    x = 2,065,183,374.03/69,678.61
  6. Step 6: Final answer
    x = 29,638.70

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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.