Finding the Fourth Proportional to 138,735.20, 208,102.80 and 68,751.20
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Solution
The fourth proportional to 138,735.20, 208,102.80 and 68,751.20 is: 103,126.80
Step by Step Solution
- Step 1: Write the proportion equation
138,735.20 : 208,102.80 = 68,751.20 : x - Step 2: Convert to fraction form
138,735.20/208,102.80 = 68,751.20/x - Step 3: Cross multiply
138,735.20x = 208,102.80 × 68,751.20 - Step 4: Simplify right side
138,735.20x = 14,307,317,223.36 - Step 5: Solve for x
x = 14,307,317,223.36/138,735.20 - Step 6: Final answer
x = 103,126.80
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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.