Finding the Fourth Proportional to 128,515.20, 192,772.80 and 58,531.20
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Solution
The fourth proportional to 128,515.20, 192,772.80 and 58,531.20 is: 87,796.80
Step by Step Solution
- Step 1: Write the proportion equation
128,515.20 : 192,772.80 = 58,531.20 : x - Step 2: Convert to fraction form
128,515.20/192,772.80 = 58,531.20/x - Step 3: Cross multiply
128,515.20x = 192,772.80 × 58,531.20 - Step 4: Simplify right side
128,515.20x = 11,283,223,311.36 - Step 5: Solve for x
x = 11,283,223,311.36/128,515.20 - Step 6: Final answer
x = 87,796.80
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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.