Finding the Fourth Proportional to 128,311.90, 192,795.90 and 113,877.70
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Solution
The fourth proportional to 128,311.90, 192,795.90 and 113,877.70 is: 171,107.70
Step by Step Solution
- Step 1: Write the proportion equation
128,311.90 : 192,795.90 = 113,877.70 : x - Step 2: Convert to fraction form
128,311.90/192,795.90 = 113,877.70/x - Step 3: Cross multiply
128,311.90x = 192,795.90 × 113,877.70 - Step 4: Simplify right side
128,311.90x = 21,955,153,661.43 - Step 5: Solve for x
x = 21,955,153,661.43/128,311.90 - Step 6: Final answer
x = 171,107.70
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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.