Finding the Fourth Proportional to 157,646.64, 217,556.99 and 86,031.28
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Solution
The fourth proportional to 157,646.64, 217,556.99 and 86,031.28 is: 118,725.69
Step by Step Solution
- Step 1: Write the proportion equation
157,646.64 : 217,556.99 = 86,031.28 : x - Step 2: Convert to fraction form
157,646.64/217,556.99 = 86,031.28/x - Step 3: Cross multiply
157,646.64x = 217,556.99 × 86,031.28 - Step 4: Simplify right side
157,646.64x = 18,716,706,322.65 - Step 5: Solve for x
x = 18,716,706,322.65/157,646.64 - Step 6: Final answer
x = 118,725.69
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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.