Finding the Fourth Proportional to 83,645.80, 125,468.70 and 76,906.60
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Solution
The fourth proportional to 83,645.80, 125,468.70 and 76,906.60 is: 115,359.90
Step by Step Solution
- Step 1: Write the proportion equation
83,645.80 : 125,468.70 = 76,906.60 : x - Step 2: Convert to fraction form
83,645.80/125,468.70 = 76,906.60/x - Step 3: Cross multiply
83,645.80x = 125,468.70 × 76,906.60 - Step 4: Simplify right side
83,645.80x = 9,649,371,123.42 - Step 5: Solve for x
x = 9,649,371,123.42/83,645.80 - Step 6: Final answer
x = 115,359.90
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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.