Finding the Fourth Proportional to 128,847.30, 177,808.92 and 72,259.88
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Solution
The fourth proportional to 128,847.30, 177,808.92 and 72,259.88 is: 99,718.44
Step by Step Solution
- Step 1: Write the proportion equation
128,847.30 : 177,808.92 = 72,259.88 : x - Step 2: Convert to fraction form
128,847.30/177,808.92 = 72,259.88/x - Step 3: Cross multiply
128,847.30x = 177,808.92 × 72,259.88 - Step 4: Simplify right side
128,847.30x = 12,848,451,222.13 - Step 5: Solve for x
x = 12,848,451,222.13/128,847.30 - Step 6: Final answer
x = 99,718.44
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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.