Finding the Fourth Proportional to 91.24, 125.91 and 49.79
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Solution
The fourth proportional to 91.24, 125.91 and 49.79 is: 68.71
Step by Step Solution
- Step 1: Write the proportion equation
91.24 : 125.91 = 49.79 : x - Step 2: Convert to fraction form
91.24/125.91 = 49.79/x - Step 3: Cross multiply
91.24x = 125.91 × 49.79 - Step 4: Simplify right side
91.24x = 6,269.25 - Step 5: Solve for x
x = 6,269.25/91.24 - Step 6: Final answer
x = 68.71
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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.