Finding the Fourth Proportional to 153,178.74, 211,405.65 and 86,110.74
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Solution
The fourth proportional to 153,178.74, 211,405.65 and 86,110.74 is: 118,843.50
Step by Step Solution
- Step 1: Write the proportion equation
153,178.74 : 211,405.65 = 86,110.74 : x - Step 2: Convert to fraction form
153,178.74/211,405.65 = 86,110.74/x - Step 3: Cross multiply
153,178.74x = 211,405.65 × 86,110.74 - Step 4: Simplify right side
153,178.74x = 18,204,296,961.68 - Step 5: Solve for x
x = 18,204,296,961.68/153,178.74 - Step 6: Final answer
x = 118,843.50
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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.