Finding the Fourth Proportional to 72,778.84, 100,434.08 and 40,512.96
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Solution
The fourth proportional to 72,778.84, 100,434.08 and 40,512.96 is: 55,907.49
Step by Step Solution
- Step 1: Write the proportion equation
72,778.84 : 100,434.08 = 40,512.96 : x - Step 2: Convert to fraction form
72,778.84/100,434.08 = 40,512.96/x - Step 3: Cross multiply
72,778.84x = 100,434.08 × 40,512.96 - Step 4: Simplify right side
72,778.84x = 4,068,881,966.96 - Step 5: Solve for x
x = 4,068,881,966.96/72,778.84 - Step 6: Final answer
x = 55,907.49
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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.