Finding the Fourth Proportional to 129,921.75, 179,292.11 and 70,305.75
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Solution
The fourth proportional to 129,921.75, 179,292.11 and 70,305.75 is: 97,021.98
Step by Step Solution
- Step 1: Write the proportion equation
129,921.75 : 179,292.11 = 70,305.75 : x - Step 2: Convert to fraction form
129,921.75/179,292.11 = 70,305.75/x - Step 3: Cross multiply
129,921.75x = 179,292.11 × 70,305.75 - Step 4: Simplify right side
129,921.75x = 12,605,265,911.10 - Step 5: Solve for x
x = 12,605,265,911.10/129,921.75 - Step 6: Final answer
x = 97,021.98
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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.