Finding the Fourth Proportional to 138,921.80, 208,382.70 and 133,089.80
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Solution
The fourth proportional to 138,921.80, 208,382.70 and 133,089.80 is: 199,634.70
Step by Step Solution
- Step 1: Write the proportion equation
138,921.80 : 208,382.70 = 133,089.80 : x - Step 2: Convert to fraction form
138,921.80/208,382.70 = 133,089.80/x - Step 3: Cross multiply
138,921.80x = 208,382.70 × 133,089.80 - Step 4: Simplify right side
138,921.80x = 27,733,611,866.46 - Step 5: Solve for x
x = 27,733,611,866.46/138,921.80 - Step 6: Final answer
x = 199,634.70
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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.