Finding the Fourth Proportional to 135.45, 186.99 and 80.21
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Solution
The fourth proportional to 135.45, 186.99 and 80.21 is: 110.72
Step by Step Solution
- Step 1: Write the proportion equation
135.45 : 186.99 = 80.21 : x - Step 2: Convert to fraction form
135.45/186.99 = 80.21/x - Step 3: Cross multiply
135.45x = 186.99 × 80.21 - Step 4: Simplify right side
135.45x = 14,997.53 - Step 5: Solve for x
x = 14,997.53/135.45 - Step 6: Final answer
x = 110.72
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.