Finding the Fourth Proportional to 205,197.80, 283,177.71 and 128,720.12
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Solution
The fourth proportional to 205,197.80, 283,177.71 and 128,720.12 is: 177,636.74
Step by Step Solution
- Step 1: Write the proportion equation
205,197.80 : 283,177.71 = 128,720.12 : x - Step 2: Convert to fraction form
205,197.80/283,177.71 = 128,720.12/x - Step 3: Cross multiply
205,197.80x = 283,177.71 × 128,720.12 - Step 4: Simplify right side
205,197.80x = 36,450,667,396.64 - Step 5: Solve for x
x = 36,450,667,396.64/205,197.80 - Step 6: Final answer
x = 177,636.74
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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.