Finding the Fourth Proportional to 137,881.05, 206,821.58 and 85,393.05
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Solution
The fourth proportional to 137,881.05, 206,821.58 and 85,393.05 is: 128,089.58
Step by Step Solution
- Step 1: Write the proportion equation
137,881.05 : 206,821.58 = 85,393.05 : x - Step 2: Convert to fraction form
137,881.05/206,821.58 = 85,393.05/x - Step 3: Cross multiply
137,881.05x = 206,821.58 × 85,393.05 - Step 4: Simplify right side
137,881.05x = 17,661,125,095.05 - Step 5: Solve for x
x = 17,661,125,095.05/137,881.05 - Step 6: Final answer
x = 128,089.58
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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.