Finding the Fourth Proportional to 76,415.99, 105,236.08 and 55,161.59
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Solution
The fourth proportional to 76,415.99, 105,236.08 and 55,161.59 is: 75,965.64
Step by Step Solution
- Step 1: Write the proportion equation
76,415.99 : 105,236.08 = 55,161.59 : x - Step 2: Convert to fraction form
76,415.99/105,236.08 = 55,161.59/x - Step 3: Cross multiply
76,415.99x = 105,236.08 × 55,161.59 - Step 4: Simplify right side
76,415.99x = 5,804,988,834.08 - Step 5: Solve for x
x = 5,804,988,834.08/76,415.99 - Step 6: Final answer
x = 75,965.64
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Double scale
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Similar ratio
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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.