Finding the Fourth Proportional to 135.21, 201.84 and 121.56
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Solution
The fourth proportional to 135.21, 201.84 and 121.56 is: 181.46
Step by Step Solution
- Step 1: Write the proportion equation
135.21 : 201.84 = 121.56 : x - Step 2: Convert to fraction form
135.21/201.84 = 121.56/x - Step 3: Cross multiply
135.21x = 201.84 × 121.56 - Step 4: Simplify right side
135.21x = 24,535.67 - Step 5: Solve for x
x = 24,535.67/135.21 - Step 6: Final answer
x = 181.46
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.