Finding the Fourth Proportional to 127.82, 191.86 and 66.99
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Solution
The fourth proportional to 127.82, 191.86 and 66.99 is: 100.55
Step by Step Solution
- Step 1: Write the proportion equation
127.82 : 191.86 = 66.99 : x - Step 2: Convert to fraction form
127.82/191.86 = 66.99/x - Step 3: Cross multiply
127.82x = 191.86 × 66.99 - Step 4: Simplify right side
127.82x = 12,852.37 - Step 5: Solve for x
x = 12,852.37/127.82 - Step 6: Final answer
x = 100.55
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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.