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Finding the Fourth Proportional to 98.44, 146.80 and 94.20

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Solution

The fourth proportional to 98.44, 146.80 and 94.20 is: 140.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.44 : 146.80 = 94.20 : x
  2. Step 2: Convert to fraction form
    98.44/146.80 = 94.20/x
  3. Step 3: Cross multiply
    98.44x = 146.80 × 94.20
  4. Step 4: Simplify right side
    98.44x = 13,828.56
  5. Step 5: Solve for x
    x = 13,828.56/98.44
  6. Step 6: Final answer
    x = 140.48

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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.