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Finding the Fourth Proportional to 148.90, 205.38 and 140.26

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Solution

The fourth proportional to 148.90, 205.38 and 140.26 is: 193.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.90 : 205.38 = 140.26 : x
  2. Step 2: Convert to fraction form
    148.90/205.38 = 140.26/x
  3. Step 3: Cross multiply
    148.90x = 205.38 × 140.26
  4. Step 4: Simplify right side
    148.90x = 28,806.60
  5. Step 5: Solve for x
    x = 28,806.60/148.90
  6. Step 6: Final answer
    x = 193.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.