Finding the Fourth Proportional to 138,188.80, 207,283.20 and 95,979.70
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Solution
The fourth proportional to 138,188.80, 207,283.20 and 95,979.70 is: 143,969.55
Step by Step Solution
- Step 1: Write the proportion equation
138,188.80 : 207,283.20 = 95,979.70 : x - Step 2: Convert to fraction form
138,188.80/207,283.20 = 95,979.70/x - Step 3: Cross multiply
138,188.80x = 207,283.20 × 95,979.70 - Step 4: Simplify right side
138,188.80x = 19,894,979,351.04 - Step 5: Solve for x
x = 19,894,979,351.04/138,188.80 - Step 6: Final answer
x = 143,969.55
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1.5x scale
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.