Finding the Fourth Proportional to 120,828.88, 181,275.99 and 85,989.70
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Solution
The fourth proportional to 120,828.88, 181,275.99 and 85,989.70 is: 129,007.80
Step by Step Solution
- Step 1: Write the proportion equation
120,828.88 : 181,275.99 = 85,989.70 : x - Step 2: Convert to fraction form
120,828.88/181,275.99 = 85,989.70/x - Step 3: Cross multiply
120,828.88x = 181,275.99 × 85,989.70 - Step 4: Simplify right side
120,828.88x = 15,587,867,997.30 - Step 5: Solve for x
x = 15,587,867,997.30/120,828.88 - Step 6: Final answer
x = 129,007.80
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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.