Finding the Fourth Proportional to 121.08, 181.44 and 84.96
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Solution
The fourth proportional to 121.08, 181.44 and 84.96 is: 127.31
Step by Step Solution
- Step 1: Write the proportion equation
121.08 : 181.44 = 84.96 : x - Step 2: Convert to fraction form
121.08/181.44 = 84.96/x - Step 3: Cross multiply
121.08x = 181.44 × 84.96 - Step 4: Simplify right side
121.08x = 15,415.14 - Step 5: Solve for x
x = 15,415.14/121.08 - Step 6: Final answer
x = 127.31
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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.