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Finding the Fourth Proportional to 148.05, 202.98 and 145.45

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Solution

The fourth proportional to 148.05, 202.98 and 145.45 is: 199.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.05 : 202.98 = 145.45 : x
  2. Step 2: Convert to fraction form
    148.05/202.98 = 145.45/x
  3. Step 3: Cross multiply
    148.05x = 202.98 × 145.45
  4. Step 4: Simplify right side
    148.05x = 29,523.44
  5. Step 5: Solve for x
    x = 29,523.44/148.05
  6. Step 6: Final answer
    x = 199.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.