Finding the Fourth Proportional to 128,815.20, 193,295.88 and 49,934.88
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Solution
The fourth proportional to 128,815.20, 193,295.88 and 49,934.88 is: 74,930.65
Step by Step Solution
- Step 1: Write the proportion equation
128,815.20 : 193,295.88 = 49,934.88 : x - Step 2: Convert to fraction form
128,815.20/193,295.88 = 49,934.88/x - Step 3: Cross multiply
128,815.20x = 193,295.88 × 49,934.88 - Step 4: Simplify right side
128,815.20x = 9,652,206,572.29 - Step 5: Solve for x
x = 9,652,206,572.29/128,815.20 - Step 6: Final answer
x = 74,930.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.