Finding the Fourth Proportional to 121.20, 166.99 and 117.96
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Solution
The fourth proportional to 121.20, 166.99 and 117.96 is: 162.53
Step by Step Solution
- Step 1: Write the proportion equation
121.20 : 166.99 = 117.96 : x - Step 2: Convert to fraction form
121.20/166.99 = 117.96/x - Step 3: Cross multiply
121.20x = 166.99 × 117.96 - Step 4: Simplify right side
121.20x = 19,698.14 - Step 5: Solve for x
x = 19,698.14/121.20 - Step 6: Final answer
x = 162.53
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.