Finding the Fourth Proportional to 205,197.72, 283,177.65 and 128,720.07
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Solution
The fourth proportional to 205,197.72, 283,177.65 and 128,720.07 is: 177,636.71
Step by Step Solution
- Step 1: Write the proportion equation
205,197.72 : 283,177.65 = 128,720.07 : x - Step 2: Convert to fraction form
205,197.72/283,177.65 = 128,720.07/x - Step 3: Cross multiply
205,197.72x = 283,177.65 × 128,720.07 - Step 4: Simplify right side
205,197.72x = 36,450,646,930.44 - Step 5: Solve for x
x = 36,450,646,930.44/205,197.72 - Step 6: Final answer
x = 177,636.71
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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.