Finding the Fourth Proportional to 135,709.40, 203,564.10 and 85,845.80
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Solution
The fourth proportional to 135,709.40, 203,564.10 and 85,845.80 is: 128,768.70
Step by Step Solution
- Step 1: Write the proportion equation
135,709.40 : 203,564.10 = 85,845.80 : x - Step 2: Convert to fraction form
135,709.40/203,564.10 = 85,845.80/x - Step 3: Cross multiply
135,709.40x = 203,564.10 × 85,845.80 - Step 4: Simplify right side
135,709.40x = 17,475,123,015.78 - Step 5: Solve for x
x = 17,475,123,015.78/135,709.40 - Step 6: Final answer
x = 128,768.70
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1.5x scale
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.