Finding the Fourth Proportional to 122.65, 168.99 and 87.62
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Solution
The fourth proportional to 122.65, 168.99 and 87.62 is: 120.72
Step by Step Solution
- Step 1: Write the proportion equation
122.65 : 168.99 = 87.62 : x - Step 2: Convert to fraction form
122.65/168.99 = 87.62/x - Step 3: Cross multiply
122.65x = 168.99 × 87.62 - Step 4: Simplify right side
122.65x = 14,805.73 - Step 5: Solve for x
x = 14,805.73/122.65 - Step 6: Final answer
x = 120.72
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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.