Finding the Fourth Proportional to 128,489.80, 192,753.06 and 39,750.88
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Solution
The fourth proportional to 128,489.80, 192,753.06 and 39,750.88 is: 59,632.00
Step by Step Solution
- Step 1: Write the proportion equation
128,489.80 : 192,753.06 = 39,750.88 : x - Step 2: Convert to fraction form
128,489.80/192,753.06 = 39,750.88/x - Step 3: Cross multiply
128,489.80x = 192,753.06 × 39,750.88 - Step 4: Simplify right side
128,489.80x = 7,662,103,757.69 - Step 5: Solve for x
x = 7,662,103,757.69/128,489.80 - Step 6: Final answer
x = 59,632.00
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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.