Finding the Fourth Proportional to 99,742.74, 137,653.20 and 56,735.70
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Solution
The fourth proportional to 99,742.74, 137,653.20 and 56,735.70 is: 78,299.94
Step by Step Solution
- Step 1: Write the proportion equation
99,742.74 : 137,653.20 = 56,735.70 : x - Step 2: Convert to fraction form
99,742.74/137,653.20 = 56,735.70/x - Step 3: Cross multiply
99,742.74x = 137,653.20 × 56,735.70 - Step 4: Simplify right side
99,742.74x = 7,809,850,659.24 - Step 5: Solve for x
x = 7,809,850,659.24/99,742.74 - Step 6: Final answer
x = 78,299.94
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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.