Finding the Fourth Proportional to 102,138.58, 153,208.95 and 31,072.79
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Solution
The fourth proportional to 102,138.58, 153,208.95 and 31,072.79 is: 46,609.52
Step by Step Solution
- Step 1: Write the proportion equation
102,138.58 : 153,208.95 = 31,072.79 : x - Step 2: Convert to fraction form
102,138.58/153,208.95 = 31,072.79/x - Step 3: Cross multiply
102,138.58x = 153,208.95 × 31,072.79 - Step 4: Simplify right side
102,138.58x = 4,760,629,970.75 - Step 5: Solve for x
x = 4,760,629,970.75/102,138.58 - Step 6: Final answer
x = 46,609.52
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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.