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Finding the Fourth Proportional to 70,879.96, 106,329.66 and 20,963.98

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Solution

The fourth proportional to 70,879.96, 106,329.66 and 20,963.98 is: 31,448.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,879.96 : 106,329.66 = 20,963.98 : x
  2. Step 2: Convert to fraction form
    70,879.96/106,329.66 = 20,963.98/x
  3. Step 3: Cross multiply
    70,879.96x = 106,329.66 × 20,963.98
  4. Step 4: Simplify right side
    70,879.96x = 2,229,092,865.65
  5. Step 5: Solve for x
    x = 2,229,092,865.65/70,879.96
  6. Step 6: Final answer
    x = 31,448.84

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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.