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Finding the Fourth Proportional to 201.72, 302.16 and 98.84

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Solution

The fourth proportional to 201.72, 302.16 and 98.84 is: 148.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.72 : 302.16 = 98.84 : x
  2. Step 2: Convert to fraction form
    201.72/302.16 = 98.84/x
  3. Step 3: Cross multiply
    201.72x = 302.16 × 98.84
  4. Step 4: Simplify right side
    201.72x = 29,865.49
  5. Step 5: Solve for x
    x = 29,865.49/201.72
  6. Step 6: Final answer
    x = 148.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.