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Finding the Fourth Proportional to 201.36, 302.05 and 79.56

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Solution

The fourth proportional to 201.36, 302.05 and 79.56 is: 119.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.36 : 302.05 = 79.56 : x
  2. Step 2: Convert to fraction form
    201.36/302.05 = 79.56/x
  3. Step 3: Cross multiply
    201.36x = 302.05 × 79.56
  4. Step 4: Simplify right side
    201.36x = 24,031.20
  5. Step 5: Solve for x
    x = 24,031.20/201.36
  6. Step 6: Final answer
    x = 119.34

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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.