Finding the Fourth Proportional to 91,212.80, 136,905.60 and 56,220.80
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Solution
The fourth proportional to 91,212.80, 136,905.60 and 56,220.80 is: 84,384.45
Step by Step Solution
- Step 1: Write the proportion equation
91,212.80 : 136,905.60 = 56,220.80 : x - Step 2: Convert to fraction form
91,212.80/136,905.60 = 56,220.80/x - Step 3: Cross multiply
91,212.80x = 136,905.60 × 56,220.80 - Step 4: Simplify right side
91,212.80x = 7,696,942,356.48 - Step 5: Solve for x
x = 7,696,942,356.48/91,212.80 - Step 6: Final answer
x = 84,384.45
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1.5x scale
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.