Finding the Fourth Proportional to 128,711.80, 193,067.70 and 73,415.80
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Solution
The fourth proportional to 128,711.80, 193,067.70 and 73,415.80 is: 110,123.70
Step by Step Solution
- Step 1: Write the proportion equation
128,711.80 : 193,067.70 = 73,415.80 : x - Step 2: Convert to fraction form
128,711.80/193,067.70 = 73,415.80/x - Step 3: Cross multiply
128,711.80x = 193,067.70 × 73,415.80 - Step 4: Simplify right side
128,711.80x = 14,174,219,649.66 - Step 5: Solve for x
x = 14,174,219,649.66/128,711.80 - Step 6: Final answer
x = 110,123.70
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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.