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Finding the Fourth Proportional to 121.34, 182.18 and 75.58

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Solution

The fourth proportional to 121.34, 182.18 and 75.58 is: 113.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.34 : 182.18 = 75.58 : x
  2. Step 2: Convert to fraction form
    121.34/182.18 = 75.58/x
  3. Step 3: Cross multiply
    121.34x = 182.18 × 75.58
  4. Step 4: Simplify right side
    121.34x = 13,769.16
  5. Step 5: Solve for x
    x = 13,769.16/121.34
  6. Step 6: Final answer
    x = 113.48

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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.