Finding the Fourth Proportional to 92,489.70, 138,734.55 and 76,937.70
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Solution
The fourth proportional to 92,489.70, 138,734.55 and 76,937.70 is: 115,406.55
Step by Step Solution
- Step 1: Write the proportion equation
92,489.70 : 138,734.55 = 76,937.70 : x - Step 2: Convert to fraction form
92,489.70/138,734.55 = 76,937.70/x - Step 3: Cross multiply
92,489.70x = 138,734.55 × 76,937.70 - Step 4: Simplify right side
92,489.70x = 10,673,917,187.54 - Step 5: Solve for x
x = 10,673,917,187.54/92,489.70 - Step 6: Final answer
x = 115,406.55
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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.