Finding the Fourth Proportional to 121,319.70, 181,979.55 and 42,425.70
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Solution
The fourth proportional to 121,319.70, 181,979.55 and 42,425.70 is: 63,638.55
Step by Step Solution
- Step 1: Write the proportion equation
121,319.70 : 181,979.55 = 42,425.70 : x - Step 2: Convert to fraction form
121,319.70/181,979.55 = 42,425.70/x - Step 3: Cross multiply
121,319.70x = 181,979.55 × 42,425.70 - Step 4: Simplify right side
121,319.70x = 7,720,609,794.44 - Step 5: Solve for x
x = 7,720,609,794.44/121,319.70 - Step 6: Final answer
x = 63,638.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.