Finding the Fourth Proportional to 81,531,987.57, 122,143,672.24 and 48,195,396.95
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Solution
The fourth proportional to 81,531,987.57, 122,143,672.24 and 48,195,396.95 is: 72,201,879.83
Step by Step Solution
- Step 1: Write the proportion equation
81,531,987.57 : 122,143,672.24 = 48,195,396.95 : x - Step 2: Convert to fraction form
81,531,987.57/122,143,672.24 = 48,195,396.95/x - Step 3: Cross multiply
81,531,987.57x = 122,143,672.24 × 48,195,396.95 - Step 4: Simplify right side
81,531,987.57x = 5,886,762,768,595,040 - Step 5: Solve for x
x = 5,886,762,768,595,040/81,531,987.57 - Step 6: Final answer
x = 72,201,879.83
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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.