Finding the Fourth Proportional to 122,283.60, 168,786.90 and 79,261.80
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Solution
The fourth proportional to 122,283.60, 168,786.90 and 79,261.80 is: 109,404.32
Step by Step Solution
- Step 1: Write the proportion equation
122,283.60 : 168,786.90 = 79,261.80 : x - Step 2: Convert to fraction form
122,283.60/168,786.90 = 79,261.80/x - Step 3: Cross multiply
122,283.60x = 168,786.90 × 79,261.80 - Step 4: Simplify right side
122,283.60x = 13,378,353,510.42 - Step 5: Solve for x
x = 13,378,353,510.42/122,283.60 - Step 6: Final answer
x = 109,404.32
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1.5x scale
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.