Finding the Fourth Proportional to 137,319.02, 205,409.80 and 128,920.94
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Solution
The fourth proportional to 137,319.02, 205,409.80 and 128,920.94 is: 192,847.46
Step by Step Solution
- Step 1: Write the proportion equation
137,319.02 : 205,409.80 = 128,920.94 : x - Step 2: Convert to fraction form
137,319.02/205,409.80 = 128,920.94/x - Step 3: Cross multiply
137,319.02x = 205,409.80 × 128,920.94 - Step 4: Simplify right side
137,319.02x = 26,481,624,501.21 - Step 5: Solve for x
x = 26,481,624,501.21/137,319.02 - Step 6: Final answer
x = 192,847.46
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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.