Finding the Fourth Proportional to 75.06, 112.62 and 68.70
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Solution
The fourth proportional to 75.06, 112.62 and 68.70 is: 103.08
Step by Step Solution
- Step 1: Write the proportion equation
75.06 : 112.62 = 68.70 : x - Step 2: Convert to fraction form
75.06/112.62 = 68.70/x - Step 3: Cross multiply
75.06x = 112.62 × 68.70 - Step 4: Simplify right side
75.06x = 7,736.99 - Step 5: Solve for x
x = 7,736.99/75.06 - Step 6: Final answer
x = 103.08
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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.