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Finding the Fourth Proportional to 149.75, 206.47 and 97.22

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Solution

The fourth proportional to 149.75, 206.47 and 97.22 is: 134.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.75 : 206.47 = 97.22 : x
  2. Step 2: Convert to fraction form
    149.75/206.47 = 97.22/x
  3. Step 3: Cross multiply
    149.75x = 206.47 × 97.22
  4. Step 4: Simplify right side
    149.75x = 20,071.94
  5. Step 5: Solve for x
    x = 20,071.94/149.75
  6. Step 6: Final answer
    x = 134.04

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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.