Finding the Fourth Proportional to 86,989.70, 122,135.50 and 86,989.70
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Solution
The fourth proportional to 86,989.70, 122,135.50 and 86,989.70 is: 122,135.50
Step by Step Solution
- Step 1: Write the proportion equation
86,989.70 : 122,135.50 = 86,989.70 : x - Step 2: Convert to fraction form
86,989.70/122,135.50 = 86,989.70/x - Step 3: Cross multiply
86,989.70x = 122,135.50 × 86,989.70 - Step 4: Simplify right side
86,989.70x = 10,624,530,504.35 - Step 5: Solve for x
x = 10,624,530,504.35/86,989.70 - Step 6: Final answer
x = 122,135.50
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.