Finding the Fourth Proportional to 128,440.17, 177,247.18 and 71,851.55
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Solution
The fourth proportional to 128,440.17, 177,247.18 and 71,851.55 is: 99,154.99
Step by Step Solution
- Step 1: Write the proportion equation
128,440.17 : 177,247.18 = 71,851.55 : x - Step 2: Convert to fraction form
128,440.17/177,247.18 = 71,851.55/x - Step 3: Cross multiply
128,440.17x = 177,247.18 × 71,851.55 - Step 4: Simplify right side
128,440.17x = 12,735,483,729.89 - Step 5: Solve for x
x = 12,735,483,729.89/128,440.17 - Step 6: Final answer
x = 99,154.99
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1.5x scale
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.