Finding the Fourth Proportional to 128,412.99, 177,215.13 and 71,051.31
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Solution
The fourth proportional to 128,412.99, 177,215.13 and 71,051.31 is: 98,053.69
Step by Step Solution
- Step 1: Write the proportion equation
128,412.99 : 177,215.13 = 71,051.31 : x - Step 2: Convert to fraction form
128,412.99/177,215.13 = 71,051.31/x - Step 3: Cross multiply
128,412.99x = 177,215.13 × 71,051.31 - Step 4: Simplify right side
128,412.99x = 12,591,367,138.32 - Step 5: Solve for x
x = 12,591,367,138.32/128,412.99 - Step 6: Final answer
x = 98,053.69
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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.