Finding the Fourth Proportional to 107.51, 160.99 and 81.23
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Solution
The fourth proportional to 107.51, 160.99 and 81.23 is: 121.63
Step by Step Solution
- Step 1: Write the proportion equation
107.51 : 160.99 = 81.23 : x - Step 2: Convert to fraction form
107.51/160.99 = 81.23/x - Step 3: Cross multiply
107.51x = 160.99 × 81.23 - Step 4: Simplify right side
107.51x = 13,076.21 - Step 5: Solve for x
x = 13,076.21/107.51 - Step 6: Final answer
x = 121.63
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.