Finding the Fourth Proportional to 155.19, 214.07 and 122.43
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Solution
The fourth proportional to 155.19, 214.07 and 122.43 is: 168.88
Step by Step Solution
- Step 1: Write the proportion equation
155.19 : 214.07 = 122.43 : x - Step 2: Convert to fraction form
155.19/214.07 = 122.43/x - Step 3: Cross multiply
155.19x = 214.07 × 122.43 - Step 4: Simplify right side
155.19x = 26,207.98 - Step 5: Solve for x
x = 26,207.98/155.19 - Step 6: Final answer
x = 168.88
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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.