Finding the Fourth Proportional to 142,019,990.70, 213,029,986.05 and 103,756,238.70
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Solution
The fourth proportional to 142,019,990.70, 213,029,986.05 and 103,756,238.70 is: 155,634,358.05
Step by Step Solution
- Step 1: Write the proportion equation
142,019,990.70 : 213,029,986.05 = 103,756,238.70 : x - Step 2: Convert to fraction form
142,019,990.70/213,029,986.05 = 103,756,238.70/x - Step 3: Cross multiply
142,019,990.70x = 213,029,986.05 × 103,756,238.70 - Step 4: Simplify right side
142,019,990.70x = 22,103,190,082,861,472 - Step 5: Solve for x
x = 22,103,190,082,861,472/142,019,990.70 - Step 6: Final answer
x = 155,634,358.05
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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.