Finding the Fourth Proportional to 111,279.42, 153,619.74 and 74,989.80
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Solution
The fourth proportional to 111,279.42, 153,619.74 and 74,989.80 is: 103,522.41
Step by Step Solution
- Step 1: Write the proportion equation
111,279.42 : 153,619.74 = 74,989.80 : x - Step 2: Convert to fraction form
111,279.42/153,619.74 = 74,989.80/x - Step 3: Cross multiply
111,279.42x = 153,619.74 × 74,989.80 - Step 4: Simplify right side
111,279.42x = 11,519,913,578.65 - Step 5: Solve for x
x = 11,519,913,578.65/111,279.42 - Step 6: Final answer
x = 103,522.41
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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.