Finding the Fourth Proportional to 135.81, 187.51 and 121.23
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Solution
The fourth proportional to 135.81, 187.51 and 121.23 is: 167.38
Step by Step Solution
- Step 1: Write the proportion equation
135.81 : 187.51 = 121.23 : x - Step 2: Convert to fraction form
135.81/187.51 = 121.23/x - Step 3: Cross multiply
135.81x = 187.51 × 121.23 - Step 4: Simplify right side
135.81x = 22,731.23 - Step 5: Solve for x
x = 22,731.23/135.81 - Step 6: Final answer
x = 167.38
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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.