Finding the Fourth Proportional to 112.76, 155.76 and 111.99
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Solution
The fourth proportional to 112.76, 155.76 and 111.99 is: 154.70
Step by Step Solution
- Step 1: Write the proportion equation
112.76 : 155.76 = 111.99 : x - Step 2: Convert to fraction form
112.76/155.76 = 111.99/x - Step 3: Cross multiply
112.76x = 155.76 × 111.99 - Step 4: Simplify right side
112.76x = 17,443.56 - Step 5: Solve for x
x = 17,443.56/112.76 - Step 6: Final answer
x = 154.70
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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.