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Finding the Fourth Proportional to 101.72, 151.78 and 98.24

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Solution

The fourth proportional to 101.72, 151.78 and 98.24 is: 146.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.72 : 151.78 = 98.24 : x
  2. Step 2: Convert to fraction form
    101.72/151.78 = 98.24/x
  3. Step 3: Cross multiply
    101.72x = 151.78 × 98.24
  4. Step 4: Simplify right side
    101.72x = 14,910.87
  5. Step 5: Solve for x
    x = 14,910.87/101.72
  6. Step 6: Final answer
    x = 146.59

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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.