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Finding the Fourth Proportional to 148.48, 205.12 and 134.72

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Solution

The fourth proportional to 148.48, 205.12 and 134.72 is: 186.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.48 : 205.12 = 134.72 : x
  2. Step 2: Convert to fraction form
    148.48/205.12 = 134.72/x
  3. Step 3: Cross multiply
    148.48x = 205.12 × 134.72
  4. Step 4: Simplify right side
    148.48x = 27,633.77
  5. Step 5: Solve for x
    x = 27,633.77/148.48
  6. Step 6: Final answer
    x = 186.11

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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.