Finding the Fourth Proportional to 157.91, 217.79 and 121.00
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Solution
The fourth proportional to 157.91, 217.79 and 121.00 is: 166.89
Step by Step Solution
- Step 1: Write the proportion equation
157.91 : 217.79 = 121.00 : x - Step 2: Convert to fraction form
157.91/217.79 = 121.00/x - Step 3: Cross multiply
157.91x = 217.79 × 121.00 - Step 4: Simplify right side
157.91x = 26,352.98 - Step 5: Solve for x
x = 26,352.98/157.91 - Step 6: Final answer
x = 166.89
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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.