Finding the Fourth Proportional to 137,280.72, 189,450.99 and 76,851.09
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Solution
The fourth proportional to 137,280.72, 189,450.99 and 76,851.09 is: 106,056.52
Step by Step Solution
- Step 1: Write the proportion equation
137,280.72 : 189,450.99 = 76,851.09 : x - Step 2: Convert to fraction form
137,280.72/189,450.99 = 76,851.09/x - Step 3: Cross multiply
137,280.72x = 189,450.99 × 76,851.09 - Step 4: Simplify right side
137,280.72x = 14,559,515,083.08 - Step 5: Solve for x
x = 14,559,515,083.08/137,280.72 - Step 6: Final answer
x = 106,056.52
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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.