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Finding the Fourth Proportional to 148.88, 221.90 and 140.16

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Solution

The fourth proportional to 148.88, 221.90 and 140.16 is: 208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.88 : 221.90 = 140.16 : x
  2. Step 2: Convert to fraction form
    148.88/221.90 = 140.16/x
  3. Step 3: Cross multiply
    148.88x = 221.90 × 140.16
  4. Step 4: Simplify right side
    148.88x = 31,101.50
  5. Step 5: Solve for x
    x = 31,101.50/148.88
  6. Step 6: Final answer
    x = 208.90

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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.