Finding the Fourth Proportional to 138,911.80, 208,367.70 and 133,079.80
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Solution
The fourth proportional to 138,911.80, 208,367.70 and 133,079.80 is: 199,619.70
Step by Step Solution
- Step 1: Write the proportion equation
138,911.80 : 208,367.70 = 133,079.80 : x - Step 2: Convert to fraction form
138,911.80/208,367.70 = 133,079.80/x - Step 3: Cross multiply
138,911.80x = 208,367.70 × 133,079.80 - Step 4: Simplify right side
138,911.80x = 27,729,531,842.46 - Step 5: Solve for x
x = 27,729,531,842.46/138,911.80 - Step 6: Final answer
x = 199,619.70
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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.