Finding the Fourth Proportional to 138,206.07, 207,421.97 and 71,666.19
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Solution
The fourth proportional to 138,206.07, 207,421.97 and 71,666.19 is: 107,557.81
Step by Step Solution
- Step 1: Write the proportion equation
138,206.07 : 207,421.97 = 71,666.19 : x - Step 2: Convert to fraction form
138,206.07/207,421.97 = 71,666.19/x - Step 3: Cross multiply
138,206.07x = 207,421.97 × 71,666.19 - Step 4: Simplify right side
138,206.07x = 14,865,141,953.86 - Step 5: Solve for x
x = 14,865,141,953.86/138,206.07 - Step 6: Final answer
x = 107,557.81
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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.