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Finding the Fourth Proportional to 150.12, 208.40 and 145.66

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Solution

The fourth proportional to 150.12, 208.40 and 145.66 is: 202.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.12 : 208.40 = 145.66 : x
  2. Step 2: Convert to fraction form
    150.12/208.40 = 145.66/x
  3. Step 3: Cross multiply
    150.12x = 208.40 × 145.66
  4. Step 4: Simplify right side
    150.12x = 30,355.54
  5. Step 5: Solve for x
    x = 30,355.54/150.12
  6. Step 6: Final answer
    x = 202.21

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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.