Finding the Fourth Proportional to 112.21, 167.11 and 106.99
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Solution
The fourth proportional to 112.21, 167.11 and 106.99 is: 159.33
Step by Step Solution
- Step 1: Write the proportion equation
112.21 : 167.11 = 106.99 : x - Step 2: Convert to fraction form
112.21/167.11 = 106.99/x - Step 3: Cross multiply
112.21x = 167.11 × 106.99 - Step 4: Simplify right side
112.21x = 17,878.41 - Step 5: Solve for x
x = 17,878.41/112.21 - Step 6: Final answer
x = 159.33
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.