Finding the Fourth Proportional to 91.69, 126.57 and 58.99
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Solution
The fourth proportional to 91.69, 126.57 and 58.99 is: 81.43
Step by Step Solution
- Step 1: Write the proportion equation
91.69 : 126.57 = 58.99 : x - Step 2: Convert to fraction form
91.69/126.57 = 58.99/x - Step 3: Cross multiply
91.69x = 126.57 × 58.99 - Step 4: Simplify right side
91.69x = 7,466.36 - Step 5: Solve for x
x = 7,466.36/91.69 - Step 6: Final answer
x = 81.43
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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.