Finding the Fourth Proportional to 99,439.06, 149,158.59 and 81,871.99
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Solution
The fourth proportional to 99,439.06, 149,158.59 and 81,871.99 is: 122,807.98
Step by Step Solution
- Step 1: Write the proportion equation
99,439.06 : 149,158.59 = 81,871.99 : x - Step 2: Convert to fraction form
99,439.06/149,158.59 = 81,871.99/x - Step 3: Cross multiply
99,439.06x = 149,158.59 × 81,871.99 - Step 4: Simplify right side
99,439.06x = 12,211,909,843.10 - Step 5: Solve for x
x = 12,211,909,843.10/99,439.06 - Step 6: Final answer
x = 122,807.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.