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Finding the Fourth Proportional to 149.04, 205.68 and 142.56

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Solution

The fourth proportional to 149.04, 205.68 and 142.56 is: 196.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.04 : 205.68 = 142.56 : x
  2. Step 2: Convert to fraction form
    149.04/205.68 = 142.56/x
  3. Step 3: Cross multiply
    149.04x = 205.68 × 142.56
  4. Step 4: Simplify right side
    149.04x = 29,321.74
  5. Step 5: Solve for x
    x = 29,321.74/149.04
  6. Step 6: Final answer
    x = 196.74

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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.