Finding the Fourth Proportional to 81,652,519.80, 122,478,779.70 and 56,143,351.80
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Solution
The fourth proportional to 81,652,519.80, 122,478,779.70 and 56,143,351.80 is: 84,215,027.70
Step by Step Solution
- Step 1: Write the proportion equation
81,652,519.80 : 122,478,779.70 = 56,143,351.80 : x - Step 2: Convert to fraction form
81,652,519.80/122,478,779.70 = 56,143,351.80/x - Step 3: Cross multiply
81,652,519.80x = 122,478,779.70 × 56,143,351.80 - Step 4: Simplify right side
81,652,519.80x = 6,876,369,216,731,798 - Step 5: Solve for x
x = 6,876,369,216,731,798/81,652,519.80 - Step 6: Final answer
x = 84,215,027.70
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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.