Finding the Fourth Proportional to 83,124.80, 124,687.20 and 74,139.20
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Solution
The fourth proportional to 83,124.80, 124,687.20 and 74,139.20 is: 111,208.80
Step by Step Solution
- Step 1: Write the proportion equation
83,124.80 : 124,687.20 = 74,139.20 : x - Step 2: Convert to fraction form
83,124.80/124,687.20 = 74,139.20/x - Step 3: Cross multiply
83,124.80x = 124,687.20 × 74,139.20 - Step 4: Simplify right side
83,124.80x = 9,244,209,258.24 - Step 5: Solve for x
x = 9,244,209,258.24/83,124.80 - Step 6: Final answer
x = 111,208.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.