Finding the Fourth Proportional to 85,469,116.70, 128,203,675.05 and 76,959,062.30
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Solution
The fourth proportional to 85,469,116.70, 128,203,675.05 and 76,959,062.30 is: 115,438,593.45
Step by Step Solution
- Step 1: Write the proportion equation
85,469,116.70 : 128,203,675.05 = 76,959,062.30 : x - Step 2: Convert to fraction form
85,469,116.70/128,203,675.05 = 76,959,062.30/x - Step 3: Cross multiply
85,469,116.70x = 128,203,675.05 × 76,959,062.30 - Step 4: Simplify right side
85,469,116.70x = 9,866,434,615,261,906 - Step 5: Solve for x
x = 9,866,434,615,261,906/85,469,116.70 - Step 6: Final answer
x = 115,438,593.45
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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.