Finding the Fourth Proportional to 77,855.20, 107,442.31 and 47,639.97
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Solution
The fourth proportional to 77,855.20, 107,442.31 and 47,639.97 is: 65,744.46
Step by Step Solution
- Step 1: Write the proportion equation
77,855.20 : 107,442.31 = 47,639.97 : x - Step 2: Convert to fraction form
77,855.20/107,442.31 = 47,639.97/x - Step 3: Cross multiply
77,855.20x = 107,442.31 × 47,639.97 - Step 4: Simplify right side
77,855.20x = 5,118,548,425.13 - Step 5: Solve for x
x = 5,118,548,425.13/77,855.20 - Step 6: Final answer
x = 65,744.46
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.