Finding the Fourth Proportional to 129,198.18, 178,271.87 and 71,835.90
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Solution
The fourth proportional to 129,198.18, 178,271.87 and 71,835.90 is: 99,121.52
Step by Step Solution
- Step 1: Write the proportion equation
129,198.18 : 178,271.87 = 71,835.90 : x - Step 2: Convert to fraction form
129,198.18/178,271.87 = 71,835.90/x - Step 3: Cross multiply
129,198.18x = 178,271.87 × 71,835.90 - Step 4: Simplify right side
129,198.18x = 12,806,320,226.13 - Step 5: Solve for x
x = 12,806,320,226.13/129,198.18 - Step 6: Final answer
x = 99,121.52
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.