Finding the Fourth Proportional to 75.11, 112.74 and 74.99
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Solution
The fourth proportional to 75.11, 112.74 and 74.99 is: 112.56
Step by Step Solution
- Step 1: Write the proportion equation
75.11 : 112.74 = 74.99 : x - Step 2: Convert to fraction form
75.11/112.74 = 74.99/x - Step 3: Cross multiply
75.11x = 112.74 × 74.99 - Step 4: Simplify right side
75.11x = 8,454.00 - Step 5: Solve for x
x = 8,454.00/75.11 - Step 6: Final answer
x = 112.56
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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.