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Finding the Fourth Proportional to 69,205.65, 103,808.55 and 19,285.89

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Solution

The fourth proportional to 69,205.65, 103,808.55 and 19,285.89 is: 28,928.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,205.65 : 103,808.55 = 19,285.89 : x
  2. Step 2: Convert to fraction form
    69,205.65/103,808.55 = 19,285.89/x
  3. Step 3: Cross multiply
    69,205.65x = 103,808.55 × 19,285.89
  4. Step 4: Simplify right side
    69,205.65x = 2,002,040,179.93
  5. Step 5: Solve for x
    x = 2,002,040,179.93/69,205.65
  6. Step 6: Final answer
    x = 28,928.85

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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.