Finding the Fourth Proportional to 129,330.24, 178,491.27 and 78,341.48
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Solution
The fourth proportional to 129,330.24, 178,491.27 and 78,341.48 is: 108,120.65
Step by Step Solution
- Step 1: Write the proportion equation
129,330.24 : 178,491.27 = 78,341.48 : x - Step 2: Convert to fraction form
129,330.24/178,491.27 = 78,341.48/x - Step 3: Cross multiply
129,330.24x = 178,491.27 × 78,341.48 - Step 4: Simplify right side
129,330.24x = 13,983,268,974.72 - Step 5: Solve for x
x = 13,983,268,974.72/129,330.24 - Step 6: Final answer
x = 108,120.65
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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.