Finding the Fourth Proportional to 107.99, 161.91 and 71.81
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Solution
The fourth proportional to 107.99, 161.91 and 71.81 is: 107.66
Step by Step Solution
- Step 1: Write the proportion equation
107.99 : 161.91 = 71.81 : x - Step 2: Convert to fraction form
107.99/161.91 = 71.81/x - Step 3: Cross multiply
107.99x = 161.91 × 71.81 - Step 4: Simplify right side
107.99x = 11,625.95 - Step 5: Solve for x
x = 11,625.95/107.99 - Step 6: Final answer
x = 107.66
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.