Finding the Fourth Proportional to 135,278.80, 202,918.20 and 128,021.20
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Solution
The fourth proportional to 135,278.80, 202,918.20 and 128,021.20 is: 192,031.80
Step by Step Solution
- Step 1: Write the proportion equation
135,278.80 : 202,918.20 = 128,021.20 : x - Step 2: Convert to fraction form
135,278.80/202,918.20 = 128,021.20/x - Step 3: Cross multiply
135,278.80x = 202,918.20 × 128,021.20 - Step 4: Simplify right side
135,278.80x = 25,977,831,465.84 - Step 5: Solve for x
x = 25,977,831,465.84/135,278.80 - Step 6: Final answer
x = 192,031.80
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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.