Finding the Fourth Proportional to 153,421.68, 211,708.44 and 85,433.52
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Solution
The fourth proportional to 153,421.68, 211,708.44 and 85,433.52 is: 117,890.75
Step by Step Solution
- Step 1: Write the proportion equation
153,421.68 : 211,708.44 = 85,433.52 : x - Step 2: Convert to fraction form
153,421.68/211,708.44 = 85,433.52/x - Step 3: Cross multiply
153,421.68x = 211,708.44 × 85,433.52 - Step 4: Simplify right side
153,421.68x = 18,086,997,242.91 - Step 5: Solve for x
x = 18,086,997,242.91/153,421.68 - Step 6: Final answer
x = 117,890.75
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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.