Finding the Fourth Proportional to 139,557.78, 209,241.94 and 71,000.84
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Solution
The fourth proportional to 139,557.78, 209,241.94 and 71,000.84 is: 106,453.07
Step by Step Solution
- Step 1: Write the proportion equation
139,557.78 : 209,241.94 = 71,000.84 : x - Step 2: Convert to fraction form
139,557.78/209,241.94 = 71,000.84/x - Step 3: Cross multiply
139,557.78x = 209,241.94 × 71,000.84 - Step 4: Simplify right side
139,557.78x = 14,856,353,503.23 - Step 5: Solve for x
x = 14,856,353,503.23/139,557.78 - Step 6: Final answer
x = 106,453.07
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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.