Finding the Fourth Proportional to 72,965.44, 100,692.42 and 39,431.44
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Solution
The fourth proportional to 72,965.44, 100,692.42 and 39,431.44 is: 54,415.45
Step by Step Solution
- Step 1: Write the proportion equation
72,965.44 : 100,692.42 = 39,431.44 : x - Step 2: Convert to fraction form
72,965.44/100,692.42 = 39,431.44/x - Step 3: Cross multiply
72,965.44x = 100,692.42 × 39,431.44 - Step 4: Simplify right side
72,965.44x = 3,970,447,117.68 - Step 5: Solve for x
x = 3,970,447,117.68/72,965.44 - Step 6: Final answer
x = 54,415.45
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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.