Finding the Fourth Proportional to 128,884.20, 193,067.10 and 86,893.80
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Solution
The fourth proportional to 128,884.20, 193,067.10 and 86,893.80 is: 130,165.95
Step by Step Solution
- Step 1: Write the proportion equation
128,884.20 : 193,067.10 = 86,893.80 : x - Step 2: Convert to fraction form
128,884.20/193,067.10 = 86,893.80/x - Step 3: Cross multiply
128,884.20x = 193,067.10 × 86,893.80 - Step 4: Simplify right side
128,884.20x = 16,776,333,973.98 - Step 5: Solve for x
x = 16,776,333,973.98/128,884.20 - Step 6: Final answer
x = 130,165.95
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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.