Finding the Fourth Proportional to 129,731.12, 179,028.84 and 70,115.12
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Solution
The fourth proportional to 129,731.12, 179,028.84 and 70,115.12 is: 96,758.81
Step by Step Solution
- Step 1: Write the proportion equation
129,731.12 : 179,028.84 = 70,115.12 : x - Step 2: Convert to fraction form
129,731.12/179,028.84 = 70,115.12/x - Step 3: Cross multiply
129,731.12x = 179,028.84 × 70,115.12 - Step 4: Simplify right side
129,731.12x = 12,552,628,600.06 - Step 5: Solve for x
x = 12,552,628,600.06/129,731.12 - Step 6: Final answer
x = 96,758.81
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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.