Finding the Fourth Proportional to 155.07, 214.24 and 121.99
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Solution
The fourth proportional to 155.07, 214.24 and 121.99 is: 168.54
Step by Step Solution
- Step 1: Write the proportion equation
155.07 : 214.24 = 121.99 : x - Step 2: Convert to fraction form
155.07/214.24 = 121.99/x - Step 3: Cross multiply
155.07x = 214.24 × 121.99 - Step 4: Simplify right side
155.07x = 26,135.14 - Step 5: Solve for x
x = 26,135.14/155.07 - Step 6: Final answer
x = 168.54
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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.