Finding the Fourth Proportional to 84.97, 126.91 and 69.58
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Solution
The fourth proportional to 84.97, 126.91 and 69.58 is: 103.92
Step by Step Solution
- Step 1: Write the proportion equation
84.97 : 126.91 = 69.58 : x - Step 2: Convert to fraction form
84.97/126.91 = 69.58/x - Step 3: Cross multiply
84.97x = 126.91 × 69.58 - Step 4: Simplify right side
84.97x = 8,830.40 - Step 5: Solve for x
x = 8,830.40/84.97 - Step 6: Final answer
x = 103.92
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.