Finding the Fourth Proportional to 81,341.05, 122,029.80 and 31,416.70
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Solution
The fourth proportional to 81,341.05, 122,029.80 and 31,416.70 is: 47,132.09
Step by Step Solution
- Step 1: Write the proportion equation
81,341.05 : 122,029.80 = 31,416.70 : x - Step 2: Convert to fraction form
81,341.05/122,029.80 = 31,416.70/x - Step 3: Cross multiply
81,341.05x = 122,029.80 × 31,416.70 - Step 4: Simplify right side
81,341.05x = 3,833,773,617.66 - Step 5: Solve for x
x = 3,833,773,617.66/81,341.05 - Step 6: Final answer
x = 47,132.09
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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.