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Finding the Fourth Proportional to 200.86, 301.09 and 78.96

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Solution

The fourth proportional to 200.86, 301.09 and 78.96 is: 118.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.86 : 301.09 = 78.96 : x
  2. Step 2: Convert to fraction form
    200.86/301.09 = 78.96/x
  3. Step 3: Cross multiply
    200.86x = 301.09 × 78.96
  4. Step 4: Simplify right side
    200.86x = 23,774.07
  5. Step 5: Solve for x
    x = 23,774.07/200.86
  6. Step 6: Final answer
    x = 118.36

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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.