Finding the Fourth Proportional to 128,747.70, 193,121.55 and 106,877.70
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Solution
The fourth proportional to 128,747.70, 193,121.55 and 106,877.70 is: 160,316.55
Step by Step Solution
- Step 1: Write the proportion equation
128,747.70 : 193,121.55 = 106,877.70 : x - Step 2: Convert to fraction form
128,747.70/193,121.55 = 106,877.70/x - Step 3: Cross multiply
128,747.70x = 193,121.55 × 106,877.70 - Step 4: Simplify right side
128,747.70x = 20,640,387,084.44 - Step 5: Solve for x
x = 20,640,387,084.44/128,747.70 - Step 6: Final answer
x = 160,316.55
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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.