Finding the Fourth Proportional to 85.69, 118.18 and 74.75
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Solution
The fourth proportional to 85.69, 118.18 and 74.75 is: 103.09
Step by Step Solution
- Step 1: Write the proportion equation
85.69 : 118.18 = 74.75 : x - Step 2: Convert to fraction form
85.69/118.18 = 74.75/x - Step 3: Cross multiply
85.69x = 118.18 × 74.75 - Step 4: Simplify right side
85.69x = 8,833.96 - Step 5: Solve for x
x = 8,833.96/85.69 - Step 6: Final answer
x = 103.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.