Finding the Fourth Proportional to 135,807.20, 203,710.80 and 128,031.20
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Solution
The fourth proportional to 135,807.20, 203,710.80 and 128,031.20 is: 192,046.80
Step by Step Solution
- Step 1: Write the proportion equation
135,807.20 : 203,710.80 = 128,031.20 : x - Step 2: Convert to fraction form
135,807.20/203,710.80 = 128,031.20/x - Step 3: Cross multiply
135,807.20x = 203,710.80 × 128,031.20 - Step 4: Simplify right side
135,807.20x = 26,081,338,176.96 - Step 5: Solve for x
x = 26,081,338,176.96/135,807.20 - Step 6: Final answer
x = 192,046.80
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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.