Finding the Fourth Proportional to 153,355.68, 211,630.68 and 86,287.68
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Solution
The fourth proportional to 153,355.68, 211,630.68 and 86,287.68 is: 119,076.91
Step by Step Solution
- Step 1: Write the proportion equation
153,355.68 : 211,630.68 = 86,287.68 : x - Step 2: Convert to fraction form
153,355.68/211,630.68 = 86,287.68/x - Step 3: Cross multiply
153,355.68x = 211,630.68 × 86,287.68 - Step 4: Simplify right side
153,355.68x = 18,261,120,394.02 - Step 5: Solve for x
x = 18,261,120,394.02/153,355.68 - Step 6: Final answer
x = 119,076.91
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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.