Finding the Fourth Proportional to 138,319.70, 207,479.55 and 68,335.70
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Solution
The fourth proportional to 138,319.70, 207,479.55 and 68,335.70 is: 102,503.55
Step by Step Solution
- Step 1: Write the proportion equation
138,319.70 : 207,479.55 = 68,335.70 : x - Step 2: Convert to fraction form
138,319.70/207,479.55 = 68,335.70/x - Step 3: Cross multiply
138,319.70x = 207,479.55 × 68,335.70 - Step 4: Simplify right side
138,319.70x = 14,178,260,284.94 - Step 5: Solve for x
x = 14,178,260,284.94/138,319.70 - Step 6: Final answer
x = 102,503.55
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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.