Finding the Fourth Proportional to 80,335.73, 119,785.36 and 78,128.75
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Solution
The fourth proportional to 80,335.73, 119,785.36 and 78,128.75 is: 116,494.62
Step by Step Solution
- Step 1: Write the proportion equation
80,335.73 : 119,785.36 = 78,128.75 : x - Step 2: Convert to fraction form
80,335.73/119,785.36 = 78,128.75/x - Step 3: Cross multiply
80,335.73x = 119,785.36 × 78,128.75 - Step 4: Simplify right side
80,335.73x = 9,358,680,445.10 - Step 5: Solve for x
x = 9,358,680,445.10/80,335.73 - Step 6: Final answer
x = 116,494.62
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.