Finding the Fourth Proportional to 83,785.10, 115,584.86 and 74,234.66
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Solution
The fourth proportional to 83,785.10, 115,584.86 and 74,234.66 is: 102,409.65
Step by Step Solution
- Step 1: Write the proportion equation
83,785.10 : 115,584.86 = 74,234.66 : x - Step 2: Convert to fraction form
83,785.10/115,584.86 = 74,234.66/x - Step 3: Cross multiply
83,785.10x = 115,584.86 × 74,234.66 - Step 4: Simplify right side
83,785.10x = 8,580,402,390.91 - Step 5: Solve for x
x = 8,580,402,390.91/83,785.10 - Step 6: Final answer
x = 102,409.65
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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.