Finding the Fourth Proportional to 128,752.96, 177,687.30 and 71,398.84
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Solution
The fourth proportional to 128,752.96, 177,687.30 and 71,398.84 is: 98,534.95
Step by Step Solution
- Step 1: Write the proportion equation
128,752.96 : 177,687.30 = 71,398.84 : x - Step 2: Convert to fraction form
128,752.96/177,687.30 = 71,398.84/x - Step 3: Cross multiply
128,752.96x = 177,687.30 × 71,398.84 - Step 4: Simplify right side
128,752.96x = 12,686,667,102.73 - Step 5: Solve for x
x = 12,686,667,102.73/128,752.96 - Step 6: Final answer
x = 98,534.95
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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.