Finding the Fourth Proportional to 112.92, 155.88 and 99.96
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Solution
The fourth proportional to 112.92, 155.88 and 99.96 is: 137.99
Step by Step Solution
- Step 1: Write the proportion equation
112.92 : 155.88 = 99.96 : x - Step 2: Convert to fraction form
112.92/155.88 = 99.96/x - Step 3: Cross multiply
112.92x = 155.88 × 99.96 - Step 4: Simplify right side
112.92x = 15,581.76 - Step 5: Solve for x
x = 15,581.76/112.92 - Step 6: Final answer
x = 137.99
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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.