Finding the Fourth Proportional to 121.23, 181.77 and 80.63
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Solution
The fourth proportional to 121.23, 181.77 and 80.63 is: 120.89
Step by Step Solution
- Step 1: Write the proportion equation
121.23 : 181.77 = 80.63 : x - Step 2: Convert to fraction form
121.23/181.77 = 80.63/x - Step 3: Cross multiply
121.23x = 181.77 × 80.63 - Step 4: Simplify right side
121.23x = 14,655.21 - Step 5: Solve for x
x = 14,655.21/121.23 - Step 6: Final answer
x = 120.89
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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.