Finding the Fourth Proportional to 128,479.10, 177,299.01 and 71,117.19
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Solution
The fourth proportional to 128,479.10, 177,299.01 and 71,117.19 is: 98,140.53
Step by Step Solution
- Step 1: Write the proportion equation
128,479.10 : 177,299.01 = 71,117.19 : x - Step 2: Convert to fraction form
128,479.10/177,299.01 = 71,117.19/x - Step 3: Cross multiply
128,479.10x = 177,299.01 × 71,117.19 - Step 4: Simplify right side
128,479.10x = 12,609,007,380.98 - Step 5: Solve for x
x = 12,609,007,380.98/128,479.10 - Step 6: Final answer
x = 98,140.53
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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.