Finding the Fourth Proportional to 85,469,189.20, 128,203,783.80 and 76,959,134.80
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Solution
The fourth proportional to 85,469,189.20, 128,203,783.80 and 76,959,134.80 is: 115,438,702.20
Step by Step Solution
- Step 1: Write the proportion equation
85,469,189.20 : 128,203,783.80 = 76,959,134.80 : x - Step 2: Convert to fraction form
85,469,189.20/128,203,783.80 = 76,959,134.80/x - Step 3: Cross multiply
85,469,189.20x = 128,203,783.80 × 76,959,134.80 - Step 4: Simplify right side
85,469,189.20x = 9,866,452,279,334,256 - Step 5: Solve for x
x = 9,866,452,279,334,256/85,469,189.20 - Step 6: Final answer
x = 115,438,702.20
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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.