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Finding the Fourth Proportional to 148.98, 222.07 and 139.70

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Solution

The fourth proportional to 148.98, 222.07 and 139.70 is: 208.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.98 : 222.07 = 139.70 : x
  2. Step 2: Convert to fraction form
    148.98/222.07 = 139.70/x
  3. Step 3: Cross multiply
    148.98x = 222.07 × 139.70
  4. Step 4: Simplify right side
    148.98x = 31,022.48
  5. Step 5: Solve for x
    x = 31,022.48/148.98
  6. Step 6: Final answer
    x = 208.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.