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Finding the Fourth Proportional to 146.48, 202.16 and 118.72

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Solution

The fourth proportional to 146.48, 202.16 and 118.72 is: 163.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.48 : 202.16 = 118.72 : x
  2. Step 2: Convert to fraction form
    146.48/202.16 = 118.72/x
  3. Step 3: Cross multiply
    146.48x = 202.16 × 118.72
  4. Step 4: Simplify right side
    146.48x = 24,000.44
  5. Step 5: Solve for x
    x = 24,000.44/146.48
  6. Step 6: Final answer
    x = 163.85

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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.