Finding the Fourth Proportional to 125.81, 188.99 and 77.19
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Solution
The fourth proportional to 125.81, 188.99 and 77.19 is: 115.95
Step by Step Solution
- Step 1: Write the proportion equation
125.81 : 188.99 = 77.19 : x - Step 2: Convert to fraction form
125.81/188.99 = 77.19/x - Step 3: Cross multiply
125.81x = 188.99 × 77.19 - Step 4: Simplify right side
125.81x = 14,588.14 - Step 5: Solve for x
x = 14,588.14/125.81 - Step 6: Final answer
x = 115.95
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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.