Finding the Fourth Proportional to 138,869.80, 208,304.70 and 130,121.80
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Solution
The fourth proportional to 138,869.80, 208,304.70 and 130,121.80 is: 195,182.70
Step by Step Solution
- Step 1: Write the proportion equation
138,869.80 : 208,304.70 = 130,121.80 : x - Step 2: Convert to fraction form
138,869.80/208,304.70 = 130,121.80/x - Step 3: Cross multiply
138,869.80x = 208,304.70 × 130,121.80 - Step 4: Simplify right side
138,869.80x = 27,104,982,512.46 - Step 5: Solve for x
x = 27,104,982,512.46/138,869.80 - Step 6: Final answer
x = 195,182.70
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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.