Finding the Fourth Proportional to 129,648.24, 178,866.36 and 87,139.44
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Solution
The fourth proportional to 129,648.24, 178,866.36 and 87,139.44 is: 120,220.02
Step by Step Solution
- Step 1: Write the proportion equation
129,648.24 : 178,866.36 = 87,139.44 : x - Step 2: Convert to fraction form
129,648.24/178,866.36 = 87,139.44/x - Step 3: Cross multiply
129,648.24x = 178,866.36 × 87,139.44 - Step 4: Simplify right side
129,648.24x = 15,586,314,445.24 - Step 5: Solve for x
x = 15,586,314,445.24/129,648.24 - Step 6: Final answer
x = 120,220.02
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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.