Finding the Fourth Proportional to 102,478.91, 141,438.18 and 75,699.09
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Solution
The fourth proportional to 102,478.91, 141,438.18 and 75,699.09 is: 104,477.52
Step by Step Solution
- Step 1: Write the proportion equation
102,478.91 : 141,438.18 = 75,699.09 : x - Step 2: Convert to fraction form
102,478.91/141,438.18 = 75,699.09/x - Step 3: Cross multiply
102,478.91x = 141,438.18 × 75,699.09 - Step 4: Simplify right side
102,478.91x = 10,706,741,801.13 - Step 5: Solve for x
x = 10,706,741,801.13/102,478.91 - Step 6: Final answer
x = 104,477.52
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.