Finding the Fourth Proportional to 138,089.68, 206,802.28 and 78,745.44
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Solution
The fourth proportional to 138,089.68, 206,802.28 and 78,745.44 is: 117,928.70
Step by Step Solution
- Step 1: Write the proportion equation
138,089.68 : 206,802.28 = 78,745.44 : x - Step 2: Convert to fraction form
138,089.68/206,802.28 = 78,745.44/x - Step 3: Cross multiply
138,089.68x = 206,802.28 × 78,745.44 - Step 4: Simplify right side
138,089.68x = 16,284,736,531.60 - Step 5: Solve for x
x = 16,284,736,531.60/138,089.68 - Step 6: Final answer
x = 117,928.70
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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.