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Finding the Fourth Proportional to 148.43, 222.10 and 90.66

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Solution

The fourth proportional to 148.43, 222.10 and 90.66 is: 135.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.43 : 222.10 = 90.66 : x
  2. Step 2: Convert to fraction form
    148.43/222.10 = 90.66/x
  3. Step 3: Cross multiply
    148.43x = 222.10 × 90.66
  4. Step 4: Simplify right side
    148.43x = 20,135.70
  5. Step 5: Solve for x
    x = 20,135.70/148.43
  6. Step 6: Final answer
    x = 135.66

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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.