Finding the Fourth Proportional to 128,363.68, 177,145.86 and 71,774.92
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Solution
The fourth proportional to 128,363.68, 177,145.86 and 71,774.92 is: 99,051.62
Step by Step Solution
- Step 1: Write the proportion equation
128,363.68 : 177,145.86 = 71,774.92 : x - Step 2: Convert to fraction form
128,363.68/177,145.86 = 71,774.92/x - Step 3: Cross multiply
128,363.68x = 177,145.86 × 71,774.92 - Step 4: Simplify right side
128,363.68x = 12,714,629,929.83 - Step 5: Solve for x
x = 12,714,629,929.83/128,363.68 - Step 6: Final answer
x = 99,051.62
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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.