Finding the Fourth Proportional to 75.18, 112.84 and 63.84
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Solution
The fourth proportional to 75.18, 112.84 and 63.84 is: 95.82
Step by Step Solution
- Step 1: Write the proportion equation
75.18 : 112.84 = 63.84 : x - Step 2: Convert to fraction form
75.18/112.84 = 63.84/x - Step 3: Cross multiply
75.18x = 112.84 × 63.84 - Step 4: Simplify right side
75.18x = 7,203.71 - Step 5: Solve for x
x = 7,203.71/75.18 - Step 6: Final answer
x = 95.82
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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.