Finding the Fourth Proportional to 139,968,143.80, 209,952,215.70 and 133,590,851.80
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Solution
The fourth proportional to 139,968,143.80, 209,952,215.70 and 133,590,851.80 is: 200,386,277.70
Step by Step Solution
- Step 1: Write the proportion equation
139,968,143.80 : 209,952,215.70 = 133,590,851.80 : x - Step 2: Convert to fraction form
139,968,143.80/209,952,215.70 = 133,590,851.80/x - Step 3: Cross multiply
139,968,143.80x = 209,952,215.70 × 133,590,851.80 - Step 4: Simplify right side
139,968,143.80x = 28,047,695,332,660,332 - Step 5: Solve for x
x = 28,047,695,332,660,332/139,968,143.80 - Step 6: Final answer
x = 200,386,277.70
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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.