Finding the Fourth Proportional to 103,435.20, 142,739.68 and 63,140.48
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Solution
The fourth proportional to 103,435.20, 142,739.68 and 63,140.48 is: 87,133.32
Step by Step Solution
- Step 1: Write the proportion equation
103,435.20 : 142,739.68 = 63,140.48 : x - Step 2: Convert to fraction form
103,435.20/142,739.68 = 63,140.48/x - Step 3: Cross multiply
103,435.20x = 142,739.68 × 63,140.48 - Step 4: Simplify right side
103,435.20x = 9,012,651,910.25 - Step 5: Solve for x
x = 9,012,651,910.25/103,435.20 - Step 6: Final answer
x = 87,133.32
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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.