Finding the Fourth Proportional to 135.70, 203.54 and 81.92
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Solution
The fourth proportional to 135.70, 203.54 and 81.92 is: 122.88
Step by Step Solution
- Step 1: Write the proportion equation
135.70 : 203.54 = 81.92 : x - Step 2: Convert to fraction form
135.70/203.54 = 81.92/x - Step 3: Cross multiply
135.70x = 203.54 × 81.92 - Step 4: Simplify right side
135.70x = 16,674.10 - Step 5: Solve for x
x = 16,674.10/135.70 - Step 6: Final answer
x = 122.88
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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.