Finding the Fourth Proportional to 138,021.66, 190,464.98 and 76,767.53
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Solution
The fourth proportional to 138,021.66, 190,464.98 and 76,767.53 is: 105,936.45
Step by Step Solution
- Step 1: Write the proportion equation
138,021.66 : 190,464.98 = 76,767.53 : x - Step 2: Convert to fraction form
138,021.66/190,464.98 = 76,767.53/x - Step 3: Cross multiply
138,021.66x = 190,464.98 × 76,767.53 - Step 4: Simplify right side
138,021.66x = 14,621,524,729.94 - Step 5: Solve for x
x = 14,621,524,729.94/138,021.66 - Step 6: Final answer
x = 105,936.45
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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.