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Finding the Fourth Proportional to 149.76, 207.79 and 145.50

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Solution

The fourth proportional to 149.76, 207.79 and 145.50 is: 201.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.76 : 207.79 = 145.50 : x
  2. Step 2: Convert to fraction form
    149.76/207.79 = 145.50/x
  3. Step 3: Cross multiply
    149.76x = 207.79 × 145.50
  4. Step 4: Simplify right side
    149.76x = 30,232.72
  5. Step 5: Solve for x
    x = 30,232.72/149.76
  6. Step 6: Final answer
    x = 201.88

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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.