Finding the Fourth Proportional to 122,178.60, 168,606.21 and 74,431.92
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Solution
The fourth proportional to 122,178.60, 168,606.21 and 74,431.92 is: 102,715.89
Step by Step Solution
- Step 1: Write the proportion equation
122,178.60 : 168,606.21 = 74,431.92 : x - Step 2: Convert to fraction form
122,178.60/168,606.21 = 74,431.92/x - Step 3: Cross multiply
122,178.60x = 168,606.21 × 74,431.92 - Step 4: Simplify right side
122,178.60x = 12,549,683,934.22 - Step 5: Solve for x
x = 12,549,683,934.22/122,178.60 - Step 6: Final answer
x = 102,715.89
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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.