Finding the Fourth Proportional to 128,437.90, 177,239.93 and 71,079.65
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Solution
The fourth proportional to 128,437.90, 177,239.93 and 71,079.65 is: 98,087.49
Step by Step Solution
- Step 1: Write the proportion equation
128,437.90 : 177,239.93 = 71,079.65 : x - Step 2: Convert to fraction form
128,437.90/177,239.93 = 71,079.65/x - Step 3: Cross multiply
128,437.90x = 177,239.93 × 71,079.65 - Step 4: Simplify right side
128,437.90x = 12,598,151,481.92 - Step 5: Solve for x
x = 12,598,151,481.92/128,437.90 - Step 6: Final answer
x = 98,087.49
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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.