Finding the Fourth Proportional to 154,687,943.86, 213,417,064.65 and 87,699,715.63
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Solution
The fourth proportional to 154,687,943.86, 213,417,064.65 and 87,699,715.63 is: 120,995,957.50
Step by Step Solution
- Step 1: Write the proportion equation
154,687,943.86 : 213,417,064.65 = 87,699,715.63 : x - Step 2: Convert to fraction form
154,687,943.86/213,417,064.65 = 87,699,715.63/x - Step 3: Cross multiply
154,687,943.86x = 213,417,064.65 × 87,699,715.63 - Step 4: Simplify right side
154,687,943.86x = 18,716,615,880,394,324 - Step 5: Solve for x
x = 18,716,615,880,394,324/154,687,943.86 - Step 6: Final answer
x = 120,995,957.50
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.