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Finding the Fourth Proportional to 146.40, 201.96 and 102.72

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Solution

The fourth proportional to 146.40, 201.96 and 102.72 is: 141.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.40 : 201.96 = 102.72 : x
  2. Step 2: Convert to fraction form
    146.40/201.96 = 102.72/x
  3. Step 3: Cross multiply
    146.40x = 201.96 × 102.72
  4. Step 4: Simplify right side
    146.40x = 20,745.33
  5. Step 5: Solve for x
    x = 20,745.33/146.40
  6. Step 6: Final answer
    x = 141.70

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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.