Finding the Fourth Proportional to 128,909.80, 193,364.70 and 120,161.80
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Solution
The fourth proportional to 128,909.80, 193,364.70 and 120,161.80 is: 180,242.70
Step by Step Solution
- Step 1: Write the proportion equation
128,909.80 : 193,364.70 = 120,161.80 : x - Step 2: Convert to fraction form
128,909.80/193,364.70 = 120,161.80/x - Step 3: Cross multiply
128,909.80x = 193,364.70 × 120,161.80 - Step 4: Simplify right side
128,909.80x = 23,235,050,408.46 - Step 5: Solve for x
x = 23,235,050,408.46/128,909.80 - Step 6: Final answer
x = 180,242.70
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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.