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Finding the Fourth Proportional to 148.30, 204.39 and 120.76

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Solution

The fourth proportional to 148.30, 204.39 and 120.76 is: 166.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.30 : 204.39 = 120.76 : x
  2. Step 2: Convert to fraction form
    148.30/204.39 = 120.76/x
  3. Step 3: Cross multiply
    148.30x = 204.39 × 120.76
  4. Step 4: Simplify right side
    148.30x = 24,682.14
  5. Step 5: Solve for x
    x = 24,682.14/148.30
  6. Step 6: Final answer
    x = 166.43

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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.