Finding the Fourth Proportional to 108.08, 161.80 and 80.60
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Solution
The fourth proportional to 108.08, 161.80 and 80.60 is: 120.66
Step by Step Solution
- Step 1: Write the proportion equation
108.08 : 161.80 = 80.60 : x - Step 2: Convert to fraction form
108.08/161.80 = 80.60/x - Step 3: Cross multiply
108.08x = 161.80 × 80.60 - Step 4: Simplify right side
108.08x = 13,041.08 - Step 5: Solve for x
x = 13,041.08/108.08 - Step 6: Final answer
x = 120.66
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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.