Finding the Fourth Proportional to 128,367.52, 177,163.68 and 71,782.08
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Solution
The fourth proportional to 128,367.52, 177,163.68 and 71,782.08 is: 99,068.50
Step by Step Solution
- Step 1: Write the proportion equation
128,367.52 : 177,163.68 = 71,782.08 : x - Step 2: Convert to fraction form
128,367.52/177,163.68 = 71,782.08/x - Step 3: Cross multiply
128,367.52x = 177,163.68 × 71,782.08 - Step 4: Simplify right side
128,367.52x = 12,717,177,450.85 - Step 5: Solve for x
x = 12,717,177,450.85/128,367.52 - Step 6: Final answer
x = 99,068.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.