Finding the Fourth Proportional to 112.34, 168.21 and 60.74
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Solution
The fourth proportional to 112.34, 168.21 and 60.74 is: 90.95
Step by Step Solution
- Step 1: Write the proportion equation
112.34 : 168.21 = 60.74 : x - Step 2: Convert to fraction form
112.34/168.21 = 60.74/x - Step 3: Cross multiply
112.34x = 168.21 × 60.74 - Step 4: Simplify right side
112.34x = 10,217.22 - Step 5: Solve for x
x = 10,217.22/112.34 - Step 6: Final answer
x = 90.95
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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.