Finding the Fourth Proportional to 122.58, 170.64 and 122.58
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Solution
The fourth proportional to 122.58, 170.64 and 122.58 is: 170.64
Step by Step Solution
- Step 1: Write the proportion equation
122.58 : 170.64 = 122.58 : x - Step 2: Convert to fraction form
122.58/170.64 = 122.58/x - Step 3: Cross multiply
122.58x = 170.64 × 122.58 - Step 4: Simplify right side
122.58x = 20,917.05 - Step 5: Solve for x
x = 20,917.05/122.58 - Step 6: Final answer
x = 170.64
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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.