Finding the Fourth Proportional to 78,326.56, 117,489.28 and 19,163.08
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Solution
The fourth proportional to 78,326.56, 117,489.28 and 19,163.08 is: 28,744.48
Step by Step Solution
- Step 1: Write the proportion equation
78,326.56 : 117,489.28 = 19,163.08 : x - Step 2: Convert to fraction form
78,326.56/117,489.28 = 19,163.08/x - Step 3: Cross multiply
78,326.56x = 117,489.28 × 19,163.08 - Step 4: Simplify right side
78,326.56x = 2,251,456,471.78 - Step 5: Solve for x
x = 2,251,456,471.78/78,326.56 - Step 6: Final answer
x = 28,744.48
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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.