Finding the Fourth Proportional to 85.56, 128.42 and 44.99
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Solution
The fourth proportional to 85.56, 128.42 and 44.99 is: 67.52
Step by Step Solution
- Step 1: Write the proportion equation
85.56 : 128.42 = 44.99 : x - Step 2: Convert to fraction form
85.56/128.42 = 44.99/x - Step 3: Cross multiply
85.56x = 128.42 × 44.99 - Step 4: Simplify right side
85.56x = 5,776.75 - Step 5: Solve for x
x = 5,776.75/85.56 - Step 6: Final answer
x = 67.52
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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.