Finding the Fourth Proportional to 75,078.81, 112,614.26 and 18,918.88
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Solution
The fourth proportional to 75,078.81, 112,614.26 and 18,918.88 is: 28,377.32
Step by Step Solution
- Step 1: Write the proportion equation
75,078.81 : 112,614.26 = 18,918.88 : x - Step 2: Convert to fraction form
75,078.81/112,614.26 = 18,918.88/x - Step 3: Cross multiply
75,078.81x = 112,614.26 × 18,918.88 - Step 4: Simplify right side
75,078.81x = 2,130,535,108.16 - Step 5: Solve for x
x = 2,130,535,108.16/75,078.81 - Step 6: Final answer
x = 28,377.32
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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.