Finding the Fourth Proportional to 135.21, 201.71 and 120.58
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Solution
The fourth proportional to 135.21, 201.71 and 120.58 is: 179.88
Step by Step Solution
- Step 1: Write the proportion equation
135.21 : 201.71 = 120.58 : x - Step 2: Convert to fraction form
135.21/201.71 = 120.58/x - Step 3: Cross multiply
135.21x = 201.71 × 120.58 - Step 4: Simplify right side
135.21x = 24,322.19 - Step 5: Solve for x
x = 24,322.19/135.21 - Step 6: Final answer
x = 179.88
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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.