Finding the Fourth Proportional to 138,214.94, 207,305.96 and 81,322.87
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Solution
The fourth proportional to 138,214.94, 207,305.96 and 81,322.87 is: 121,974.63
Step by Step Solution
- Step 1: Write the proportion equation
138,214.94 : 207,305.96 = 81,322.87 : x - Step 2: Convert to fraction form
138,214.94/207,305.96 = 81,322.87/x - Step 3: Cross multiply
138,214.94x = 207,305.96 × 81,322.87 - Step 4: Simplify right side
138,214.94x = 16,858,715,635.31 - Step 5: Solve for x
x = 16,858,715,635.31/138,214.94 - Step 6: Final answer
x = 121,974.63
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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.