Finding the Fourth Proportional to 137,120.05, 189,224.57 and 76,690.64
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Solution
The fourth proportional to 137,120.05, 189,224.57 and 76,690.64 is: 105,832.48
Step by Step Solution
- Step 1: Write the proportion equation
137,120.05 : 189,224.57 = 76,690.64 : x - Step 2: Convert to fraction form
137,120.05/189,224.57 = 76,690.64/x - Step 3: Cross multiply
137,120.05x = 189,224.57 × 76,690.64 - Step 4: Simplify right side
137,120.05x = 14,511,754,070.53 - Step 5: Solve for x
x = 14,511,754,070.53/137,120.05 - Step 6: Final answer
x = 105,832.48
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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.