Finding the Fourth Proportional to 128,379.99, 177,159.11 and 70,235.76
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Solution
The fourth proportional to 128,379.99, 177,159.11 and 70,235.76 is: 96,922.46
Step by Step Solution
- Step 1: Write the proportion equation
128,379.99 : 177,159.11 = 70,235.76 : x - Step 2: Convert to fraction form
128,379.99/177,159.11 = 70,235.76/x - Step 3: Cross multiply
128,379.99x = 177,159.11 × 70,235.76 - Step 4: Simplify right side
128,379.99x = 12,442,904,380.59 - Step 5: Solve for x
x = 12,442,904,380.59/128,379.99 - Step 6: Final answer
x = 96,922.46
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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.