Finding the Fourth Proportional to 112.56, 155.22 and 68.88
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Solution
The fourth proportional to 112.56, 155.22 and 68.88 is: 94.99
Step by Step Solution
- Step 1: Write the proportion equation
112.56 : 155.22 = 68.88 : x - Step 2: Convert to fraction form
112.56/155.22 = 68.88/x - Step 3: Cross multiply
112.56x = 155.22 × 68.88 - Step 4: Simplify right side
112.56x = 10,691.55 - Step 5: Solve for x
x = 10,691.55/112.56 - Step 6: Final answer
x = 94.99
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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.