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Finding the Fourth Proportional to 149.39, 206.27 and 102.74

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Solution

The fourth proportional to 149.39, 206.27 and 102.74 is: 141.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.39 : 206.27 = 102.74 : x
  2. Step 2: Convert to fraction form
    149.39/206.27 = 102.74/x
  3. Step 3: Cross multiply
    149.39x = 206.27 × 102.74
  4. Step 4: Simplify right side
    149.39x = 21,191.02
  5. Step 5: Solve for x
    x = 21,191.02/149.39
  6. Step 6: Final answer
    x = 141.85

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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.