Finding the Fourth Proportional to 128,171.12, 192,274.96 and 39,432.08
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Solution
The fourth proportional to 128,171.12, 192,274.96 and 39,432.08 is: 59,153.74
Step by Step Solution
- Step 1: Write the proportion equation
128,171.12 : 192,274.96 = 39,432.08 : x - Step 2: Convert to fraction form
128,171.12/192,274.96 = 39,432.08/x - Step 3: Cross multiply
128,171.12x = 192,274.96 × 39,432.08 - Step 4: Simplify right side
128,171.12x = 7,581,801,604.72 - Step 5: Solve for x
x = 7,581,801,604.72/128,171.12 - Step 6: Final answer
x = 59,153.74
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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.