Finding the Fourth Proportional to 128,306.52, 192,467.64 and 49,420.98
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Solution
The fourth proportional to 128,306.52, 192,467.64 and 49,420.98 is: 74,134.50
Step by Step Solution
- Step 1: Write the proportion equation
128,306.52 : 192,467.64 = 49,420.98 : x - Step 2: Convert to fraction form
128,306.52/192,467.64 = 49,420.98/x - Step 3: Cross multiply
128,306.52x = 192,467.64 × 49,420.98 - Step 4: Simplify right side
128,306.52x = 9,511,939,387.09 - Step 5: Solve for x
x = 9,511,939,387.09/128,306.52 - Step 6: Final answer
x = 74,134.50
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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.