Finding the Fourth Proportional to 99,689.63, 137,571.68 and 54,977.63
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Solution
The fourth proportional to 99,689.63, 137,571.68 and 54,977.63 is: 75,869.12
Step by Step Solution
- Step 1: Write the proportion equation
99,689.63 : 137,571.68 = 54,977.63 : x - Step 2: Convert to fraction form
99,689.63/137,571.68 = 54,977.63/x - Step 3: Cross multiply
99,689.63x = 137,571.68 × 54,977.63 - Step 4: Simplify right side
99,689.63x = 7,563,364,371.10 - Step 5: Solve for x
x = 7,563,364,371.10/99,689.63 - Step 6: Final answer
x = 75,869.12
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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.