Finding the Fourth Proportional to 81,615.80, 122,349.76 and 29,012.99
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Solution
The fourth proportional to 81,615.80, 122,349.76 and 29,012.99 is: 43,493.19
Step by Step Solution
- Step 1: Write the proportion equation
81,615.80 : 122,349.76 = 29,012.99 : x - Step 2: Convert to fraction form
81,615.80/122,349.76 = 29,012.99/x - Step 3: Cross multiply
81,615.80x = 122,349.76 × 29,012.99 - Step 4: Simplify right side
81,615.80x = 3,549,731,679.10 - Step 5: Solve for x
x = 3,549,731,679.10/81,615.80 - Step 6: Final answer
x = 43,493.19
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.