Finding the Fourth Proportional to 135.50, 203.11 and 77.69
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Solution
The fourth proportional to 135.50, 203.11 and 77.69 is: 116.45
Step by Step Solution
- Step 1: Write the proportion equation
135.50 : 203.11 = 77.69 : x - Step 2: Convert to fraction form
135.50/203.11 = 77.69/x - Step 3: Cross multiply
135.50x = 203.11 × 77.69 - Step 4: Simplify right side
135.50x = 15,779.62 - Step 5: Solve for x
x = 15,779.62/135.50 - Step 6: Final answer
x = 116.45
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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.