Finding the Fourth Proportional to 128,764.08, 177,689.50 and 71,405.75
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Solution
The fourth proportional to 128,764.08, 177,689.50 and 71,405.75 is: 98,537.20
Step by Step Solution
- Step 1: Write the proportion equation
128,764.08 : 177,689.50 = 71,405.75 : x - Step 2: Convert to fraction form
128,764.08/177,689.50 = 71,405.75/x - Step 3: Cross multiply
128,764.08x = 177,689.50 × 71,405.75 - Step 4: Simplify right side
128,764.08x = 12,688,052,280.33 - Step 5: Solve for x
x = 12,688,052,280.33/128,764.08 - Step 6: Final answer
x = 98,537.20
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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.