Finding the Fourth Proportional to 128,783.08, 177,718.98 and 72,193.96
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Solution
The fourth proportional to 128,783.08, 177,718.98 and 72,193.96 is: 99,626.73
Step by Step Solution
- Step 1: Write the proportion equation
128,783.08 : 177,718.98 = 72,193.96 : x - Step 2: Convert to fraction form
128,783.08/177,718.98 = 72,193.96/x - Step 3: Cross multiply
128,783.08x = 177,718.98 × 72,193.96 - Step 4: Simplify right side
128,783.08x = 12,830,236,933.36 - Step 5: Solve for x
x = 12,830,236,933.36/128,783.08 - Step 6: Final answer
x = 99,626.73
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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.