Finding the Fourth Proportional to 100,914.75, 139,262.36 and 56,202.75
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Solution
The fourth proportional to 100,914.75, 139,262.36 and 56,202.75 is: 77,559.80
Step by Step Solution
- Step 1: Write the proportion equation
100,914.75 : 139,262.36 = 56,202.75 : x - Step 2: Convert to fraction form
100,914.75/139,262.36 = 56,202.75/x - Step 3: Cross multiply
100,914.75x = 139,262.36 × 56,202.75 - Step 4: Simplify right side
100,914.75x = 7,826,927,322.48 - Step 5: Solve for x
x = 7,826,927,322.48/100,914.75 - Step 6: Final answer
x = 77,559.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.