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Finding the Fourth Proportional to 66,643.82, 99,879.61 and 49,872.26

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Solution

The fourth proportional to 66,643.82, 99,879.61 and 49,872.26 is: 74,743.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,643.82 : 99,879.61 = 49,872.26 : x
  2. Step 2: Convert to fraction form
    66,643.82/99,879.61 = 49,872.26/x
  3. Step 3: Cross multiply
    66,643.82x = 99,879.61 × 49,872.26
  4. Step 4: Simplify right side
    66,643.82x = 4,981,221,878.62
  5. Step 5: Solve for x
    x = 4,981,221,878.62/66,643.82
  6. Step 6: Final answer
    x = 74,743.94

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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.