Finding the Fourth Proportional to 121.13, 166.96 and 86.08
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Solution
The fourth proportional to 121.13, 166.96 and 86.08 is: 118.65
Step by Step Solution
- Step 1: Write the proportion equation
121.13 : 166.96 = 86.08 : x - Step 2: Convert to fraction form
121.13/166.96 = 86.08/x - Step 3: Cross multiply
121.13x = 166.96 × 86.08 - Step 4: Simplify right side
121.13x = 14,371.92 - Step 5: Solve for x
x = 14,371.92/121.13 - Step 6: Final answer
x = 118.65
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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.