Finding the Fourth Proportional to 121,283.20, 170,146.40 and 121,283.20
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Solution
The fourth proportional to 121,283.20, 170,146.40 and 121,283.20 is: 170,146.40
Step by Step Solution
- Step 1: Write the proportion equation
121,283.20 : 170,146.40 = 121,283.20 : x - Step 2: Convert to fraction form
121,283.20/170,146.40 = 121,283.20/x - Step 3: Cross multiply
121,283.20x = 170,146.40 × 121,283.20 - Step 4: Simplify right side
121,283.20x = 20,635,899,860.48 - Step 5: Solve for x
x = 20,635,899,860.48/121,283.20 - Step 6: Final answer
x = 170,146.40
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.