Finding the Fourth Proportional to 128,782.26, 177,730.43 and 71,440.05
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Solution
The fourth proportional to 128,782.26, 177,730.43 and 71,440.05 is: 98,593.33
Step by Step Solution
- Step 1: Write the proportion equation
128,782.26 : 177,730.43 = 71,440.05 : x - Step 2: Convert to fraction form
128,782.26/177,730.43 = 71,440.05/x - Step 3: Cross multiply
128,782.26x = 177,730.43 × 71,440.05 - Step 4: Simplify right side
128,782.26x = 12,697,071,650.81 - Step 5: Solve for x
x = 12,697,071,650.81/128,782.26 - Step 6: Final answer
x = 98,593.33
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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.