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Finding the Fourth Proportional to 148.08, 204.48 and 115.42

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Solution

The fourth proportional to 148.08, 204.48 and 115.42 is: 159.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.08 : 204.48 = 115.42 : x
  2. Step 2: Convert to fraction form
    148.08/204.48 = 115.42/x
  3. Step 3: Cross multiply
    148.08x = 204.48 × 115.42
  4. Step 4: Simplify right side
    148.08x = 23,601.08
  5. Step 5: Solve for x
    x = 23,601.08/148.08
  6. Step 6: Final answer
    x = 159.38

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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.