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Finding the Fourth Proportional to 148.23, 222.30 and 139.95

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Solution

The fourth proportional to 148.23, 222.30 and 139.95 is: 209.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.23 : 222.30 = 139.95 : x
  2. Step 2: Convert to fraction form
    148.23/222.30 = 139.95/x
  3. Step 3: Cross multiply
    148.23x = 222.30 × 139.95
  4. Step 4: Simplify right side
    148.23x = 31,110.89
  5. Step 5: Solve for x
    x = 31,110.89/148.23
  6. Step 6: Final answer
    x = 209.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.