Finding the Fourth Proportional to 81,651,785.60, 122,309,716.80 and 56,121,622.40
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Solution
The fourth proportional to 81,651,785.60, 122,309,716.80 and 56,121,622.40 is: 84,066,988.76
Step by Step Solution
- Step 1: Write the proportion equation
81,651,785.60 : 122,309,716.80 = 56,121,622.40 : x - Step 2: Convert to fraction form
81,651,785.60/122,309,716.80 = 56,121,622.40/x - Step 3: Cross multiply
81,651,785.60x = 122,309,716.80 × 56,121,622.40 - Step 4: Simplify right side
81,651,785.60x = 6,864,219,742,100,536 - Step 5: Solve for x
x = 6,864,219,742,100,536/81,651,785.60 - Step 6: Final answer
x = 84,066,988.76
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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.