Finding the Fourth Proportional to 128,194.20, 176,905.08 and 71,605.44
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Solution
The fourth proportional to 128,194.20, 176,905.08 and 71,605.44 is: 98,813.88
Step by Step Solution
- Step 1: Write the proportion equation
128,194.20 : 176,905.08 = 71,605.44 : x - Step 2: Convert to fraction form
128,194.20/176,905.08 = 71,605.44/x - Step 3: Cross multiply
128,194.20x = 176,905.08 × 71,605.44 - Step 4: Simplify right side
128,194.20x = 12,667,366,091.64 - Step 5: Solve for x
x = 12,667,366,091.64/128,194.20 - Step 6: Final answer
x = 98,813.88
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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.