Finding the Fourth Proportional to 137,119.28, 189,224.06 and 76,689.68
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Solution
The fourth proportional to 137,119.28, 189,224.06 and 76,689.68 is: 105,831.45
Step by Step Solution
- Step 1: Write the proportion equation
137,119.28 : 189,224.06 = 76,689.68 : x - Step 2: Convert to fraction form
137,119.28/189,224.06 = 76,689.68/x - Step 3: Cross multiply
137,119.28x = 189,224.06 × 76,689.68 - Step 4: Simplify right side
137,119.28x = 14,511,532,609.70 - Step 5: Solve for x
x = 14,511,532,609.70/137,119.28 - Step 6: Final answer
x = 105,831.45
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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.