Finding the Fourth Proportional to 135.70, 203.39 and 77.19
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Solution
The fourth proportional to 135.70, 203.39 and 77.19 is: 115.69
Step by Step Solution
- Step 1: Write the proportion equation
135.70 : 203.39 = 77.19 : x - Step 2: Convert to fraction form
135.70/203.39 = 77.19/x - Step 3: Cross multiply
135.70x = 203.39 × 77.19 - Step 4: Simplify right side
135.70x = 15,698.81 - Step 5: Solve for x
x = 15,698.81/135.70 - Step 6: Final answer
x = 115.69
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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.