Finding the Fourth Proportional to 112,409.19, 155,120.09 and 61,423.70
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Solution
The fourth proportional to 112,409.19, 155,120.09 and 61,423.70 is: 84,762.19
Step by Step Solution
- Step 1: Write the proportion equation
112,409.19 : 155,120.09 = 61,423.70 : x - Step 2: Convert to fraction form
112,409.19/155,120.09 = 61,423.70/x - Step 3: Cross multiply
112,409.19x = 155,120.09 × 61,423.70 - Step 4: Simplify right side
112,409.19x = 9,528,048,789.41 - Step 5: Solve for x
x = 9,528,048,789.41/112,409.19 - Step 6: Final answer
x = 84,762.19
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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.