Finding the Fourth Proportional to 121.14, 181.68 and 35.64
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Solution
The fourth proportional to 121.14, 181.68 and 35.64 is: 53.45
Step by Step Solution
- Step 1: Write the proportion equation
121.14 : 181.68 = 35.64 : x - Step 2: Convert to fraction form
121.14/181.68 = 35.64/x - Step 3: Cross multiply
121.14x = 181.68 × 35.64 - Step 4: Simplify right side
121.14x = 6,475.08 - Step 5: Solve for x
x = 6,475.08/121.14 - Step 6: Final answer
x = 53.45
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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.