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Finding the Fourth Proportional to 148.57, 205.27 and 111.67

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Solution

The fourth proportional to 148.57, 205.27 and 111.67 is: 154.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.57 : 205.27 = 111.67 : x
  2. Step 2: Convert to fraction form
    148.57/205.27 = 111.67/x
  3. Step 3: Cross multiply
    148.57x = 205.27 × 111.67
  4. Step 4: Simplify right side
    148.57x = 22,922.50
  5. Step 5: Solve for x
    x = 22,922.50/148.57
  6. Step 6: Final answer
    x = 154.29

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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.