Finding the Fourth Proportional to 128,555.23, 192,759.01 and 68,509.78
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Solution
The fourth proportional to 128,555.23, 192,759.01 and 68,509.78 is: 102,725.32
Step by Step Solution
- Step 1: Write the proportion equation
128,555.23 : 192,759.01 = 68,509.78 : x - Step 2: Convert to fraction form
128,555.23/192,759.01 = 68,509.78/x - Step 3: Cross multiply
128,555.23x = 192,759.01 × 68,509.78 - Step 4: Simplify right side
128,555.23x = 13,205,877,368.12 - Step 5: Solve for x
x = 13,205,877,368.12/128,555.23 - Step 6: Final answer
x = 102,725.32
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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.