Finding the Fourth Proportional to 139,523,071.86, 209,143,920.35 and 87,744,679.09
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Solution
The fourth proportional to 139,523,071.86, 209,143,920.35 and 87,744,679.09 is: 131,528,541.70
Step by Step Solution
- Step 1: Write the proportion equation
139,523,071.86 : 209,143,920.35 = 87,744,679.09 : x - Step 2: Convert to fraction form
139,523,071.86/209,143,920.35 = 87,744,679.09/x - Step 3: Cross multiply
139,523,071.86x = 209,143,920.35 × 87,744,679.09 - Step 4: Simplify right side
139,523,071.86x = 18,351,266,174,735,272 - Step 5: Solve for x
x = 18,351,266,174,735,272/139,523,071.86 - Step 6: Final answer
x = 131,528,541.70
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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.