Finding the Fourth Proportional to 121.15, 166.99 and 115.75
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Solution
The fourth proportional to 121.15, 166.99 and 115.75 is: 159.55
Step by Step Solution
- Step 1: Write the proportion equation
121.15 : 166.99 = 115.75 : x - Step 2: Convert to fraction form
121.15/166.99 = 115.75/x - Step 3: Cross multiply
121.15x = 166.99 × 115.75 - Step 4: Simplify right side
121.15x = 19,329.09 - Step 5: Solve for x
x = 19,329.09/121.15 - Step 6: Final answer
x = 159.55
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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.