Finding the Fourth Proportional to 75.39, 112.95 and 54.99
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Solution
The fourth proportional to 75.39, 112.95 and 54.99 is: 82.39
Step by Step Solution
- Step 1: Write the proportion equation
75.39 : 112.95 = 54.99 : x - Step 2: Convert to fraction form
75.39/112.95 = 54.99/x - Step 3: Cross multiply
75.39x = 112.95 × 54.99 - Step 4: Simplify right side
75.39x = 6,211.12 - Step 5: Solve for x
x = 6,211.12/75.39 - Step 6: Final answer
x = 82.39
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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.