Finding the Fourth Proportional to 78,087.98, 107,761.26 and 42,277.99
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Solution
The fourth proportional to 78,087.98, 107,761.26 and 42,277.99 is: 58,343.54
Step by Step Solution
- Step 1: Write the proportion equation
78,087.98 : 107,761.26 = 42,277.99 : x - Step 2: Convert to fraction form
78,087.98/107,761.26 = 42,277.99/x - Step 3: Cross multiply
78,087.98x = 107,761.26 × 42,277.99 - Step 4: Simplify right side
78,087.98x = 4,555,928,933.86 - Step 5: Solve for x
x = 4,555,928,933.86/78,087.98 - Step 6: Final answer
x = 58,343.54
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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.