Finding the Fourth Proportional to 80.88, 121.02 and 77.08
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Solution
The fourth proportional to 80.88, 121.02 and 77.08 is: 115.33
Step by Step Solution
- Step 1: Write the proportion equation
80.88 : 121.02 = 77.08 : x - Step 2: Convert to fraction form
80.88/121.02 = 77.08/x - Step 3: Cross multiply
80.88x = 121.02 × 77.08 - Step 4: Simplify right side
80.88x = 9,328.22 - Step 5: Solve for x
x = 9,328.22/80.88 - Step 6: Final answer
x = 115.33
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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.