Finding the Fourth Proportional to 135,616.20, 203,424.30 and 85,849.80
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Solution
The fourth proportional to 135,616.20, 203,424.30 and 85,849.80 is: 128,774.70
Step by Step Solution
- Step 1: Write the proportion equation
135,616.20 : 203,424.30 = 85,849.80 : x - Step 2: Convert to fraction form
135,616.20/203,424.30 = 85,849.80/x - Step 3: Cross multiply
135,616.20x = 203,424.30 × 85,849.80 - Step 4: Simplify right side
135,616.20x = 17,463,935,470.14 - Step 5: Solve for x
x = 17,463,935,470.14/135,616.20 - Step 6: Final answer
x = 128,774.70
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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.