Finding the Fourth Proportional to 138,923.80, 208,385.70 and 133,091.80
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Solution
The fourth proportional to 138,923.80, 208,385.70 and 133,091.80 is: 199,637.70
Step by Step Solution
- Step 1: Write the proportion equation
138,923.80 : 208,385.70 = 133,091.80 : x - Step 2: Convert to fraction form
138,923.80/208,385.70 = 133,091.80/x - Step 3: Cross multiply
138,923.80x = 208,385.70 × 133,091.80 - Step 4: Simplify right side
138,923.80x = 27,734,427,907.26 - Step 5: Solve for x
x = 27,734,427,907.26/138,923.80 - Step 6: Final answer
x = 199,637.70
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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.