Finding the Fourth Proportional to 85.41, 127.89 and 60.99
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Solution
The fourth proportional to 85.41, 127.89 and 60.99 is: 91.32
Step by Step Solution
- Step 1: Write the proportion equation
85.41 : 127.89 = 60.99 : x - Step 2: Convert to fraction form
85.41/127.89 = 60.99/x - Step 3: Cross multiply
85.41x = 127.89 × 60.99 - Step 4: Simplify right side
85.41x = 7,800.01 - Step 5: Solve for x
x = 7,800.01/85.41 - Step 6: Final answer
x = 91.32
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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.