Finding the Fourth Proportional to 135.37, 202.77 and 81.13
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Solution
The fourth proportional to 135.37, 202.77 and 81.13 is: 121.52
Step by Step Solution
- Step 1: Write the proportion equation
135.37 : 202.77 = 81.13 : x - Step 2: Convert to fraction form
135.37/202.77 = 81.13/x - Step 3: Cross multiply
135.37x = 202.77 × 81.13 - Step 4: Simplify right side
135.37x = 16,450.73 - Step 5: Solve for x
x = 16,450.73/135.37 - Step 6: Final answer
x = 121.52
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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.