Finding the Fourth Proportional to 115,645.26, 159,617.13 and 75,288.75
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Solution
The fourth proportional to 115,645.26, 159,617.13 and 75,288.75 is: 103,915.84
Step by Step Solution
- Step 1: Write the proportion equation
115,645.26 : 159,617.13 = 75,288.75 : x - Step 2: Convert to fraction form
115,645.26/159,617.13 = 75,288.75/x - Step 3: Cross multiply
115,645.26x = 159,617.13 × 75,288.75 - Step 4: Simplify right side
115,645.26x = 12,017,374,196.29 - Step 5: Solve for x
x = 12,017,374,196.29/115,645.26 - Step 6: Final answer
x = 103,915.84
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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.