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Finding the Fourth Proportional to 148.49, 222.80 and 80.00

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Solution

The fourth proportional to 148.49, 222.80 and 80.00 is: 120.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.49 : 222.80 = 80.00 : x
  2. Step 2: Convert to fraction form
    148.49/222.80 = 80.00/x
  3. Step 3: Cross multiply
    148.49x = 222.80 × 80.00
  4. Step 4: Simplify right side
    148.49x = 17,822.49
  5. Step 5: Solve for x
    x = 17,822.49/148.49
  6. Step 6: Final answer
    x = 120.03

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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.