Finding the Fourth Proportional to 84,015.80, 126,023.70 and 76,239.80
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Solution
The fourth proportional to 84,015.80, 126,023.70 and 76,239.80 is: 114,359.70
Step by Step Solution
- Step 1: Write the proportion equation
84,015.80 : 126,023.70 = 76,239.80 : x - Step 2: Convert to fraction form
84,015.80/126,023.70 = 76,239.80/x - Step 3: Cross multiply
84,015.80x = 126,023.70 × 76,239.80 - Step 4: Simplify right side
84,015.80x = 9,608,021,683.26 - Step 5: Solve for x
x = 9,608,021,683.26/84,015.80 - Step 6: Final answer
x = 114,359.70
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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.