Finding the Fourth Proportional to 186.99, 257.97 and 121.53
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Solution
The fourth proportional to 186.99, 257.97 and 121.53 is: 167.66
Step by Step Solution
- Step 1: Write the proportion equation
186.99 : 257.97 = 121.53 : x - Step 2: Convert to fraction form
186.99/257.97 = 121.53/x - Step 3: Cross multiply
186.99x = 257.97 × 121.53 - Step 4: Simplify right side
186.99x = 31,351.09 - Step 5: Solve for x
x = 31,351.09/186.99 - Step 6: Final answer
x = 167.66
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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.