Finding the Fourth Proportional to 85,469,189.70, 128,203,784.55 and 76,959,135.30
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Solution
The fourth proportional to 85,469,189.70, 128,203,784.55 and 76,959,135.30 is: 115,438,702.95
Step by Step Solution
- Step 1: Write the proportion equation
85,469,189.70 : 128,203,784.55 = 76,959,135.30 : x - Step 2: Convert to fraction form
85,469,189.70/128,203,784.55 = 76,959,135.30/x - Step 3: Cross multiply
85,469,189.70x = 128,203,784.55 × 76,959,135.30 - Step 4: Simplify right side
85,469,189.70x = 9,866,452,401,155,500 - Step 5: Solve for x
x = 9,866,452,401,155,500/85,469,189.70 - Step 6: Final answer
x = 115,438,702.95
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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.