Finding the Fourth Proportional to 121,107.06, 167,033.07 and 78,679.26
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Solution
The fourth proportional to 121,107.06, 167,033.07 and 78,679.26 is: 108,515.87
Step by Step Solution
- Step 1: Write the proportion equation
121,107.06 : 167,033.07 = 78,679.26 : x - Step 2: Convert to fraction form
121,107.06/167,033.07 = 78,679.26/x - Step 3: Cross multiply
121,107.06x = 167,033.07 × 78,679.26 - Step 4: Simplify right side
121,107.06x = 13,142,038,343.13 - Step 5: Solve for x
x = 13,142,038,343.13/121,107.06 - Step 6: Final answer
x = 108,515.87
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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.