Finding the Fourth Proportional to 112.72, 168.74 and 97.52
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Solution
The fourth proportional to 112.72, 168.74 and 97.52 is: 145.99
Step by Step Solution
- Step 1: Write the proportion equation
112.72 : 168.74 = 97.52 : x - Step 2: Convert to fraction form
112.72/168.74 = 97.52/x - Step 3: Cross multiply
112.72x = 168.74 × 97.52 - Step 4: Simplify right side
112.72x = 16,455.52 - Step 5: Solve for x
x = 16,455.52/112.72 - Step 6: Final answer
x = 145.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.