Finding the Fourth Proportional to 128,489.54, 177,309.99 and 71,125.47
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Solution
The fourth proportional to 128,489.54, 177,309.99 and 71,125.47 is: 98,150.07
Step by Step Solution
- Step 1: Write the proportion equation
128,489.54 : 177,309.99 = 71,125.47 : x - Step 2: Convert to fraction form
128,489.54/177,309.99 = 71,125.47/x - Step 3: Cross multiply
128,489.54x = 177,309.99 × 71,125.47 - Step 4: Simplify right side
128,489.54x = 12,611,256,374.45 - Step 5: Solve for x
x = 12,611,256,374.45/128,489.54 - Step 6: Final answer
x = 98,150.07
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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.