Finding the Fourth Proportional to 128,842.60, 193,409.70 and 76,281.70
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Solution
The fourth proportional to 128,842.60, 193,409.70 and 76,281.70 is: 114,508.87
Step by Step Solution
- Step 1: Write the proportion equation
128,842.60 : 193,409.70 = 76,281.70 : x - Step 2: Convert to fraction form
128,842.60/193,409.70 = 76,281.70/x - Step 3: Cross multiply
128,842.60x = 193,409.70 × 76,281.70 - Step 4: Simplify right side
128,842.60x = 14,753,620,712.49 - Step 5: Solve for x
x = 14,753,620,712.49/128,842.60 - Step 6: Final answer
x = 114,508.87
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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.