Finding the Fourth Proportional to 85.18, 116.76 and 83.98
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Solution
The fourth proportional to 85.18, 116.76 and 83.98 is: 115.12
Step by Step Solution
- Step 1: Write the proportion equation
85.18 : 116.76 = 83.98 : x - Step 2: Convert to fraction form
85.18/116.76 = 83.98/x - Step 3: Cross multiply
85.18x = 116.76 × 83.98 - Step 4: Simplify right side
85.18x = 9,805.50 - Step 5: Solve for x
x = 9,805.50/85.18 - Step 6: Final answer
x = 115.12
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.