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Finding the Fourth Proportional to 148.02, 220.62 and 143.16

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Solution

The fourth proportional to 148.02, 220.62 and 143.16 is: 213.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.02 : 220.62 = 143.16 : x
  2. Step 2: Convert to fraction form
    148.02/220.62 = 143.16/x
  3. Step 3: Cross multiply
    148.02x = 220.62 × 143.16
  4. Step 4: Simplify right side
    148.02x = 31,583.96
  5. Step 5: Solve for x
    x = 31,583.96/148.02
  6. Step 6: Final answer
    x = 213.38

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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.