Finding the Fourth Proportional to 120,403.45, 166,141.02 and 69,418.09
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Solution
The fourth proportional to 120,403.45, 166,141.02 and 69,418.09 is: 95,787.89
Step by Step Solution
- Step 1: Write the proportion equation
120,403.45 : 166,141.02 = 69,418.09 : x - Step 2: Convert to fraction form
120,403.45/166,141.02 = 69,418.09/x - Step 3: Cross multiply
120,403.45x = 166,141.02 × 69,418.09 - Step 4: Simplify right side
120,403.45x = 11,533,192,279.05 - Step 5: Solve for x
x = 11,533,192,279.05/120,403.45 - Step 6: Final answer
x = 95,787.89
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.