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Finding the Fourth Proportional to 148.10, 220.69 and 143.92

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Solution

The fourth proportional to 148.10, 220.69 and 143.92 is: 214.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.10 : 220.69 = 143.92 : x
  2. Step 2: Convert to fraction form
    148.10/220.69 = 143.92/x
  3. Step 3: Cross multiply
    148.10x = 220.69 × 143.92
  4. Step 4: Simplify right side
    148.10x = 31,759.88
  5. Step 5: Solve for x
    x = 31,759.88/148.10
  6. Step 6: Final answer
    x = 214.46

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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.