Finding the Fourth Proportional to 138,960.08, 191,790.76 and 79,344.08
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Solution
The fourth proportional to 138,960.08, 191,790.76 and 79,344.08 is: 109,509.59
Step by Step Solution
- Step 1: Write the proportion equation
138,960.08 : 191,790.76 = 79,344.08 : x - Step 2: Convert to fraction form
138,960.08/191,790.76 = 79,344.08/x - Step 3: Cross multiply
138,960.08x = 191,790.76 × 79,344.08 - Step 4: Simplify right side
138,960.08x = 15,217,461,404.70 - Step 5: Solve for x
x = 15,217,461,404.70/138,960.08 - Step 6: Final answer
x = 109,509.59
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.