Finding the Fourth Proportional to 122.52, 170.25 and 120.99
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Solution
The fourth proportional to 122.52, 170.25 and 120.99 is: 168.12
Step by Step Solution
- Step 1: Write the proportion equation
122.52 : 170.25 = 120.99 : x - Step 2: Convert to fraction form
122.52/170.25 = 120.99/x - Step 3: Cross multiply
122.52x = 170.25 × 120.99 - Step 4: Simplify right side
122.52x = 20,598.55 - Step 5: Solve for x
x = 20,598.55/122.52 - Step 6: Final answer
x = 168.12
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.