Finding the Fourth Proportional to 129,465.40, 194,198.10 and 76,847.80
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Solution
The fourth proportional to 129,465.40, 194,198.10 and 76,847.80 is: 115,271.70
Step by Step Solution
- Step 1: Write the proportion equation
129,465.40 : 194,198.10 = 76,847.80 : x - Step 2: Convert to fraction form
129,465.40/194,198.10 = 76,847.80/x - Step 3: Cross multiply
129,465.40x = 194,198.10 × 76,847.80 - Step 4: Simplify right side
129,465.40x = 14,923,696,749.18 - Step 5: Solve for x
x = 14,923,696,749.18/129,465.40 - Step 6: Final answer
x = 115,271.70
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1.5x scale
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.