Finding the Fourth Proportional to 135.22, 202.74 and 81.22
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Solution
The fourth proportional to 135.22, 202.74 and 81.22 is: 121.78
Step by Step Solution
- Step 1: Write the proportion equation
135.22 : 202.74 = 81.22 : x - Step 2: Convert to fraction form
135.22/202.74 = 81.22/x - Step 3: Cross multiply
135.22x = 202.74 × 81.22 - Step 4: Simplify right side
135.22x = 16,466.54 - Step 5: Solve for x
x = 16,466.54/135.22 - Step 6: Final answer
x = 121.78
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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.