Finding the Fourth Proportional to 128,715.80, 193,073.70 and 119,967.80
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Solution
The fourth proportional to 128,715.80, 193,073.70 and 119,967.80 is: 179,951.70
Step by Step Solution
- Step 1: Write the proportion equation
128,715.80 : 193,073.70 = 119,967.80 : x - Step 2: Convert to fraction form
128,715.80/193,073.70 = 119,967.80/x - Step 3: Cross multiply
128,715.80x = 193,073.70 × 119,967.80 - Step 4: Simplify right side
128,715.80x = 23,162,627,026.86 - Step 5: Solve for x
x = 23,162,627,026.86/128,715.80 - Step 6: Final answer
x = 179,951.70
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1.5x scale
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.