Finding the Fourth Proportional to 139.24, 192.13 and 83.99
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Solution
The fourth proportional to 139.24, 192.13 and 83.99 is: 115.88
Step by Step Solution
- Step 1: Write the proportion equation
139.24 : 192.13 = 83.99 : x - Step 2: Convert to fraction form
139.24/192.13 = 83.99/x - Step 3: Cross multiply
139.24x = 192.13 × 83.99 - Step 4: Simplify right side
139.24x = 16,135.99 - Step 5: Solve for x
x = 16,135.99/139.24 - Step 6: Final answer
x = 115.88
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.