Finding the Fourth Proportional to 128,537.19, 192,814.97 and 39,779.28
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Solution
The fourth proportional to 128,537.19, 192,814.97 and 39,779.28 is: 59,671.76
Step by Step Solution
- Step 1: Write the proportion equation
128,537.19 : 192,814.97 = 39,779.28 : x - Step 2: Convert to fraction form
128,537.19/192,814.97 = 39,779.28/x - Step 3: Cross multiply
128,537.19x = 192,814.97 × 39,779.28 - Step 4: Simplify right side
128,537.19x = 7,670,040,480.93 - Step 5: Solve for x
x = 7,670,040,480.93/128,537.19 - Step 6: Final answer
x = 59,671.76
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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.