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Finding the Fourth Proportional to 143,356.14, 197,843.44 and 79,699.86

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Solution

The fourth proportional to 143,356.14, 197,843.44 and 79,699.86 is: 109,992.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,356.14 : 197,843.44 = 79,699.86 : x
  2. Step 2: Convert to fraction form
    143,356.14/197,843.44 = 79,699.86/x
  3. Step 3: Cross multiply
    143,356.14x = 197,843.44 × 79,699.86
  4. Step 4: Simplify right side
    143,356.14x = 15,768,094,469.92
  5. Step 5: Solve for x
    x = 15,768,094,469.92/143,356.14
  6. Step 6: Final answer
    x = 109,992.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.