Finding the Fourth Proportional to 81,209.70, 121,814.55 and 39,737.70
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Solution
The fourth proportional to 81,209.70, 121,814.55 and 39,737.70 is: 59,606.55
Step by Step Solution
- Step 1: Write the proportion equation
81,209.70 : 121,814.55 = 39,737.70 : x - Step 2: Convert to fraction form
81,209.70/121,814.55 = 39,737.70/x - Step 3: Cross multiply
81,209.70x = 121,814.55 × 39,737.70 - Step 4: Simplify right side
81,209.70x = 4,840,630,043.54 - Step 5: Solve for x
x = 4,840,630,043.54/81,209.70 - Step 6: Final answer
x = 59,606.55
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1.5x scale
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.