Finding the Fourth Proportional to 207,755.12, 286,564.44 and 128,128.88
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Solution
The fourth proportional to 207,755.12, 286,564.44 and 128,128.88 is: 176,732.98
Step by Step Solution
- Step 1: Write the proportion equation
207,755.12 : 286,564.44 = 128,128.88 : x - Step 2: Convert to fraction form
207,755.12/286,564.44 = 128,128.88/x - Step 3: Cross multiply
207,755.12x = 286,564.44 × 128,128.88 - Step 4: Simplify right side
207,755.12x = 36,717,180,745.03 - Step 5: Solve for x
x = 36,717,180,745.03/207,755.12 - Step 6: Final answer
x = 176,732.98
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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.