Finding the Fourth Proportional to 126.93, 175.14 and 77.79
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Solution
The fourth proportional to 126.93, 175.14 and 77.79 is: 107.34
Step by Step Solution
- Step 1: Write the proportion equation
126.93 : 175.14 = 77.79 : x - Step 2: Convert to fraction form
126.93/175.14 = 77.79/x - Step 3: Cross multiply
126.93x = 175.14 × 77.79 - Step 4: Simplify right side
126.93x = 13,624.14 - Step 5: Solve for x
x = 13,624.14/126.93 - Step 6: Final answer
x = 107.34
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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.