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Finding the Fourth Proportional to 149.84, 206.83 and 122.51

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Solution

The fourth proportional to 149.84, 206.83 and 122.51 is: 169.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.84 : 206.83 = 122.51 : x
  2. Step 2: Convert to fraction form
    149.84/206.83 = 122.51/x
  3. Step 3: Cross multiply
    149.84x = 206.83 × 122.51
  4. Step 4: Simplify right side
    149.84x = 25,337.37
  5. Step 5: Solve for x
    x = 25,337.37/149.84
  6. Step 6: Final answer
    x = 169.09

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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.