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Finding the Fourth Proportional to 149.67, 206.54 and 104.87

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Solution

The fourth proportional to 149.67, 206.54 and 104.87 is: 144.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.67 : 206.54 = 104.87 : x
  2. Step 2: Convert to fraction form
    149.67/206.54 = 104.87/x
  3. Step 3: Cross multiply
    149.67x = 206.54 × 104.87
  4. Step 4: Simplify right side
    149.67x = 21,659.14
  5. Step 5: Solve for x
    x = 21,659.14/149.67
  6. Step 6: Final answer
    x = 144.72

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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.