Finding the Fourth Proportional to 128,435.50, 177,240.99 and 71,846.92
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Solution
The fourth proportional to 128,435.50, 177,240.99 and 71,846.92 is: 99,148.75
Step by Step Solution
- Step 1: Write the proportion equation
128,435.50 : 177,240.99 = 71,846.92 : x - Step 2: Convert to fraction form
128,435.50/177,240.99 = 71,846.92/x - Step 3: Cross multiply
128,435.50x = 177,240.99 × 71,846.92 - Step 4: Simplify right side
128,435.50x = 12,734,219,229.25 - Step 5: Solve for x
x = 12,734,219,229.25/128,435.50 - Step 6: Final answer
x = 99,148.75
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1.5x scale
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.