Finding the Fourth Proportional to 103,979.70, 155,998.35 and 68,987.70
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Solution
The fourth proportional to 103,979.70, 155,998.35 and 68,987.70 is: 103,500.66
Step by Step Solution
- Step 1: Write the proportion equation
103,979.70 : 155,998.35 = 68,987.70 : x - Step 2: Convert to fraction form
103,979.70/155,998.35 = 68,987.70/x - Step 3: Cross multiply
103,979.70x = 155,998.35 × 68,987.70 - Step 4: Simplify right side
103,979.70x = 10,761,967,370.30 - Step 5: Solve for x
x = 10,761,967,370.30/103,979.70 - Step 6: Final answer
x = 103,500.66
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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.