Finding the Fourth Proportional to 139,969,201.80, 209,953,802.70 and 49,059,985.80
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Solution
The fourth proportional to 139,969,201.80, 209,953,802.70 and 49,059,985.80 is: 73,589,978.70
Step by Step Solution
- Step 1: Write the proportion equation
139,969,201.80 : 209,953,802.70 = 49,059,985.80 : x - Step 2: Convert to fraction form
139,969,201.80/209,953,802.70 = 49,059,985.80/x - Step 3: Cross multiply
139,969,201.80x = 209,953,802.70 × 49,059,985.80 - Step 4: Simplify right side
139,969,201.80x = 10,300,330,579,118,000 - Step 5: Solve for x
x = 10,300,330,579,118,000/139,969,201.80 - Step 6: Final answer
x = 73,589,978.70
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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.