Finding the Fourth Proportional to 236,904.78, 326,918.73 and 129,478.54
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Solution
The fourth proportional to 236,904.78, 326,918.73 and 129,478.54 is: 178,674.99
Step by Step Solution
- Step 1: Write the proportion equation
236,904.78 : 326,918.73 = 129,478.54 : x - Step 2: Convert to fraction form
236,904.78/326,918.73 = 129,478.54/x - Step 3: Cross multiply
236,904.78x = 326,918.73 × 129,478.54 - Step 4: Simplify right side
236,904.78x = 42,328,959,859.05 - Step 5: Solve for x
x = 42,328,959,859.05/236,904.78 - Step 6: Final answer
x = 178,674.99
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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.