Finding the Fourth Proportional to 128,905.80, 193,358.70 and 120,157.80
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Solution
The fourth proportional to 128,905.80, 193,358.70 and 120,157.80 is: 180,236.70
Step by Step Solution
- Step 1: Write the proportion equation
128,905.80 : 193,358.70 = 120,157.80 : x - Step 2: Convert to fraction form
128,905.80/193,358.70 = 120,157.80/x - Step 3: Cross multiply
128,905.80x = 193,358.70 × 120,157.80 - Step 4: Simplify right side
128,905.80x = 23,233,556,002.86 - Step 5: Solve for x
x = 23,233,556,002.86/128,905.80 - Step 6: Final answer
x = 180,236.70
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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.