Finding the Fourth Proportional to 76,939,538.40, 106,173,374.22 and 42,131,629.08
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Solution
The fourth proportional to 76,939,538.40, 106,173,374.22 and 42,131,629.08 is: 58,139,901.98
Step by Step Solution
- Step 1: Write the proportion equation
76,939,538.40 : 106,173,374.22 = 42,131,629.08 : x - Step 2: Convert to fraction form
76,939,538.40/106,173,374.22 = 42,131,629.08/x - Step 3: Cross multiply
76,939,538.40x = 106,173,374.22 × 42,131,629.08 - Step 4: Simplify right side
76,939,538.40x = 4,473,257,220,809,074 - Step 5: Solve for x
x = 4,473,257,220,809,074/76,939,538.40 - Step 6: Final answer
x = 58,139,901.98
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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.