Finding the Fourth Proportional to 145,651.68, 201,003.12 and 81,991.80
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Solution
The fourth proportional to 145,651.68, 201,003.12 and 81,991.80 is: 113,150.82
Step by Step Solution
- Step 1: Write the proportion equation
145,651.68 : 201,003.12 = 81,991.80 : x - Step 2: Convert to fraction form
145,651.68/201,003.12 = 81,991.80/x - Step 3: Cross multiply
145,651.68x = 201,003.12 × 81,991.80 - Step 4: Simplify right side
145,651.68x = 16,480,607,614.42 - Step 5: Solve for x
x = 16,480,607,614.42/145,651.68 - Step 6: Final answer
x = 113,150.82
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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.