Finding the Fourth Proportional to 112.74, 156.21 and 110.99
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Solution
The fourth proportional to 112.74, 156.21 and 110.99 is: 153.78
Step by Step Solution
- Step 1: Write the proportion equation
112.74 : 156.21 = 110.99 : x - Step 2: Convert to fraction form
112.74/156.21 = 110.99/x - Step 3: Cross multiply
112.74x = 156.21 × 110.99 - Step 4: Simplify right side
112.74x = 17,336.97 - Step 5: Solve for x
x = 17,336.97/112.74 - Step 6: Final answer
x = 153.78
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.