Finding the Fourth Proportional to 128,763.28, 193,081.68 and 53,860.96
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Solution
The fourth proportional to 128,763.28, 193,081.68 and 53,860.96 is: 80,764.99
Step by Step Solution
- Step 1: Write the proportion equation
128,763.28 : 193,081.68 = 53,860.96 : x - Step 2: Convert to fraction form
128,763.28/193,081.68 = 53,860.96/x - Step 3: Cross multiply
128,763.28x = 193,081.68 × 53,860.96 - Step 4: Simplify right side
128,763.28x = 10,399,564,643.21 - Step 5: Solve for x
x = 10,399,564,643.21/128,763.28 - Step 6: Final answer
x = 80,764.99
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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.