Finding the Fourth Proportional to 138,767.66, 207,965.01 and 72,069.02
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Solution
The fourth proportional to 138,767.66, 207,965.01 and 72,069.02 is: 108,006.68
Step by Step Solution
- Step 1: Write the proportion equation
138,767.66 : 207,965.01 = 72,069.02 : x - Step 2: Convert to fraction form
138,767.66/207,965.01 = 72,069.02/x - Step 3: Cross multiply
138,767.66x = 207,965.01 × 72,069.02 - Step 4: Simplify right side
138,767.66x = 14,987,834,464.99 - Step 5: Solve for x
x = 14,987,834,464.99/138,767.66 - Step 6: Final answer
x = 108,006.68
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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.