Finding the Fourth Proportional to 129,161.08, 178,244.40 and 71,020.26
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Solution
The fourth proportional to 129,161.08, 178,244.40 and 71,020.26 is: 98,009.12
Step by Step Solution
- Step 1: Write the proportion equation
129,161.08 : 178,244.40 = 71,020.26 : x - Step 2: Convert to fraction form
129,161.08/178,244.40 = 71,020.26/x - Step 3: Cross multiply
129,161.08x = 178,244.40 × 71,020.26 - Step 4: Simplify right side
129,161.08x = 12,658,963,631.54 - Step 5: Solve for x
x = 12,658,963,631.54/129,161.08 - Step 6: Final answer
x = 98,009.12
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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.