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Finding the Fourth Proportional to 149.90, 207.92 and 144.72

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Solution

The fourth proportional to 149.90, 207.92 and 144.72 is: 200.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.90 : 207.92 = 144.72 : x
  2. Step 2: Convert to fraction form
    149.90/207.92 = 144.72/x
  3. Step 3: Cross multiply
    149.90x = 207.92 × 144.72
  4. Step 4: Simplify right side
    149.90x = 30,090.18
  5. Step 5: Solve for x
    x = 30,090.18/149.90
  6. Step 6: Final answer
    x = 200.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.