Finding the Fourth Proportional to 128,487.79, 177,310.99 and 71,125.90
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Solution
The fourth proportional to 128,487.79, 177,310.99 and 71,125.90 is: 98,152.55
Step by Step Solution
- Step 1: Write the proportion equation
128,487.79 : 177,310.99 = 71,125.90 : x - Step 2: Convert to fraction form
128,487.79/177,310.99 = 71,125.90/x - Step 3: Cross multiply
128,487.79x = 177,310.99 × 71,125.90 - Step 4: Simplify right side
128,487.79x = 12,611,403,743.64 - Step 5: Solve for x
x = 12,611,403,743.64/128,487.79 - Step 6: Final answer
x = 98,152.55
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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.