Finding the Fourth Proportional to 153,399.40, 211,690.74 and 86,331.40
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Solution
The fourth proportional to 153,399.40, 211,690.74 and 86,331.40 is: 119,137.09
Step by Step Solution
- Step 1: Write the proportion equation
153,399.40 : 211,690.74 = 86,331.40 : x - Step 2: Convert to fraction form
153,399.40/211,690.74 = 86,331.40/x - Step 3: Cross multiply
153,399.40x = 211,690.74 × 86,331.40 - Step 4: Simplify right side
153,399.40x = 18,275,557,951.24 - Step 5: Solve for x
x = 18,275,557,951.24/153,399.40 - Step 6: Final answer
x = 119,137.09
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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.