Finding the Fourth Proportional to 126,117.44, 174,123.12 and 78,435.68
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Solution
The fourth proportional to 126,117.44, 174,123.12 and 78,435.68 is: 108,291.65
Step by Step Solution
- Step 1: Write the proportion equation
126,117.44 : 174,123.12 = 78,435.68 : x - Step 2: Convert to fraction form
126,117.44/174,123.12 = 78,435.68/x - Step 3: Cross multiply
126,117.44x = 174,123.12 × 78,435.68 - Step 4: Simplify right side
126,117.44x = 13,657,465,320.92 - Step 5: Solve for x
x = 13,657,465,320.92/126,117.44 - Step 6: Final answer
x = 108,291.65
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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.