Finding the Fourth Proportional to 128,838.60, 193,403.70 and 76,277.70
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Solution
The fourth proportional to 128,838.60, 193,403.70 and 76,277.70 is: 114,502.87
Step by Step Solution
- Step 1: Write the proportion equation
128,838.60 : 193,403.70 = 76,277.70 : x - Step 2: Convert to fraction form
128,838.60/193,403.70 = 76,277.70/x - Step 3: Cross multiply
128,838.60x = 193,403.70 × 76,277.70 - Step 4: Simplify right side
128,838.60x = 14,752,389,407.49 - Step 5: Solve for x
x = 14,752,389,407.49/128,838.60 - Step 6: Final answer
x = 114,502.87
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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.