Finding the Fourth Proportional to 92.75, 139.15 and 38.65
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Solution
The fourth proportional to 92.75, 139.15 and 38.65 is: 57.99
Step by Step Solution
- Step 1: Write the proportion equation
92.75 : 139.15 = 38.65 : x - Step 2: Convert to fraction form
92.75/139.15 = 38.65/x - Step 3: Cross multiply
92.75x = 139.15 × 38.65 - Step 4: Simplify right side
92.75x = 5,378.15 - Step 5: Solve for x
x = 5,378.15/92.75 - Step 6: Final answer
x = 57.99
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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.