Finding the Fourth Proportional to 157.74, 217.67 and 87.79
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Solution
The fourth proportional to 157.74, 217.67 and 87.79 is: 121.15
Step by Step Solution
- Step 1: Write the proportion equation
157.74 : 217.67 = 87.79 : x - Step 2: Convert to fraction form
157.74/217.67 = 87.79/x - Step 3: Cross multiply
157.74x = 217.67 × 87.79 - Step 4: Simplify right side
157.74x = 19,108.81 - Step 5: Solve for x
x = 19,108.81/157.74 - Step 6: Final answer
x = 121.15
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.