Finding the Fourth Proportional to 153,715.07, 212,128.04 and 85,729.79
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Solution
The fourth proportional to 153,715.07, 212,128.04 and 85,729.79 is: 118,307.80
Step by Step Solution
- Step 1: Write the proportion equation
153,715.07 : 212,128.04 = 85,729.79 : x - Step 2: Convert to fraction form
153,715.07/212,128.04 = 85,729.79/x - Step 3: Cross multiply
153,715.07x = 212,128.04 × 85,729.79 - Step 4: Simplify right side
153,715.07x = 18,185,692,322.31 - Step 5: Solve for x
x = 18,185,692,322.31/153,715.07 - Step 6: Final answer
x = 118,307.80
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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.