Finding the Fourth Proportional to 128,621.76, 192,907.20 and 39,853.92
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Solution
The fourth proportional to 128,621.76, 192,907.20 and 39,853.92 is: 59,773.00
Step by Step Solution
- Step 1: Write the proportion equation
128,621.76 : 192,907.20 = 39,853.92 : x - Step 2: Convert to fraction form
128,621.76/192,907.20 = 39,853.92/x - Step 3: Cross multiply
128,621.76x = 192,907.20 × 39,853.92 - Step 4: Simplify right side
128,621.76x = 7,688,108,116.22 - Step 5: Solve for x
x = 7,688,108,116.22/128,621.76 - Step 6: Final answer
x = 59,773.00
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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.