Finding the Fourth Proportional to 128,376.23, 177,159.76 and 71,787.47
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Solution
The fourth proportional to 128,376.23, 177,159.76 and 71,787.47 is: 99,067.02
Step by Step Solution
- Step 1: Write the proportion equation
128,376.23 : 177,159.76 = 71,787.47 : x - Step 2: Convert to fraction form
128,376.23/177,159.76 = 71,787.47/x - Step 3: Cross multiply
128,376.23x = 177,159.76 × 71,787.47 - Step 4: Simplify right side
128,376.23x = 12,717,849,890.94 - Step 5: Solve for x
x = 12,717,849,890.94/128,376.23 - Step 6: Final answer
x = 99,067.02
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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.