Finding the Fourth Proportional to 91,005.62, 136,425.27 and 77,055.53
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Solution
The fourth proportional to 91,005.62, 136,425.27 and 77,055.53 is: 115,512.88
Step by Step Solution
- Step 1: Write the proportion equation
91,005.62 : 136,425.27 = 77,055.53 : x - Step 2: Convert to fraction form
91,005.62/136,425.27 = 77,055.53/x - Step 3: Cross multiply
91,005.62x = 136,425.27 × 77,055.53 - Step 4: Simplify right side
91,005.62x = 10,512,321,485.24 - Step 5: Solve for x
x = 10,512,321,485.24/91,005.62 - Step 6: Final answer
x = 115,512.88
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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.