Finding the Fourth Proportional to 128,278.28, 176,909.40 and 80,536.08
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Solution
The fourth proportional to 128,278.28, 176,909.40 and 80,536.08 is: 111,067.83
Step by Step Solution
- Step 1: Write the proportion equation
128,278.28 : 176,909.40 = 80,536.08 : x - Step 2: Convert to fraction form
128,278.28/176,909.40 = 80,536.08/x - Step 3: Cross multiply
128,278.28x = 176,909.40 × 80,536.08 - Step 4: Simplify right side
128,278.28x = 14,247,589,591.15 - Step 5: Solve for x
x = 14,247,589,591.15/128,278.28 - Step 6: Final answer
x = 111,067.83
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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.