Finding the Fourth Proportional to 128,147.83, 176,843.30 and 70,791.09
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Solution
The fourth proportional to 128,147.83, 176,843.30 and 70,791.09 is: 97,691.31
Step by Step Solution
- Step 1: Write the proportion equation
128,147.83 : 176,843.30 = 70,791.09 : x - Step 2: Convert to fraction form
128,147.83/176,843.30 = 70,791.09/x - Step 3: Cross multiply
128,147.83x = 176,843.30 × 70,791.09 - Step 4: Simplify right side
128,147.83x = 12,518,928,949.08 - Step 5: Solve for x
x = 12,518,928,949.08/128,147.83 - Step 6: Final answer
x = 97,691.31
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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.