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Finding the Fourth Proportional to 134.48, 185.61 and 121.95

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Solution

The fourth proportional to 134.48, 185.61 and 121.95 is: 168.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.48 : 185.61 = 121.95 : x
  2. Step 2: Convert to fraction form
    134.48/185.61 = 121.95/x
  3. Step 3: Cross multiply
    134.48x = 185.61 × 121.95
  4. Step 4: Simplify right side
    134.48x = 22,635.14
  5. Step 5: Solve for x
    x = 22,635.14/134.48
  6. Step 6: Final answer
    x = 168.32

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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.