Finding the Fourth Proportional to 159,431.74, 220,005.69 and 87,811.75
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Solution
The fourth proportional to 159,431.74, 220,005.69 and 87,811.75 is: 121,174.65
Step by Step Solution
- Step 1: Write the proportion equation
159,431.74 : 220,005.69 = 87,811.75 : x - Step 2: Convert to fraction form
159,431.74/220,005.69 = 87,811.75/x - Step 3: Cross multiply
159,431.74x = 220,005.69 × 87,811.75 - Step 4: Simplify right side
159,431.74x = 19,319,084,648.86 - Step 5: Solve for x
x = 19,319,084,648.86/159,431.74 - Step 6: Final answer
x = 121,174.65
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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.