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Finding the Fourth Proportional to 195.99, 270.50 and 129.48

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Solution

The fourth proportional to 195.99, 270.50 and 129.48 is: 178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.99 : 270.50 = 129.48 : x
  2. Step 2: Convert to fraction form
    195.99/270.50 = 129.48/x
  3. Step 3: Cross multiply
    195.99x = 270.50 × 129.48
  4. Step 4: Simplify right side
    195.99x = 35,024.34
  5. Step 5: Solve for x
    x = 35,024.34/195.99
  6. Step 6: Final answer
    x = 178.70

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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.