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Finding the Fourth Proportional to 69,879.38, 104,731.59 and 55,029.65

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Solution

The fourth proportional to 69,879.38, 104,731.59 and 55,029.65 is: 82,475.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,879.38 : 104,731.59 = 55,029.65 : x
  2. Step 2: Convert to fraction form
    69,879.38/104,731.59 = 55,029.65/x
  3. Step 3: Cross multiply
    69,879.38x = 104,731.59 × 55,029.65
  4. Step 4: Simplify right side
    69,879.38x = 5,763,342,741.64
  5. Step 5: Solve for x
    x = 5,763,342,741.64/69,879.38
  6. Step 6: Final answer
    x = 82,475.58

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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.