Finding the Fourth Proportional to 212,821,930.40, 319,374,613.20 and 97,747,239.20
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Solution
The fourth proportional to 212,821,930.40, 319,374,613.20 and 97,747,239.20 is: 146,685,948.45
Step by Step Solution
- Step 1: Write the proportion equation
212,821,930.40 : 319,374,613.20 = 97,747,239.20 : x - Step 2: Convert to fraction form
212,821,930.40/319,374,613.20 = 97,747,239.20/x - Step 3: Cross multiply
212,821,930.40x = 319,374,613.20 × 97,747,239.20 - Step 4: Simplify right side
212,821,930.40x = 31,217,986,710,867,876 - Step 5: Solve for x
x = 31,217,986,710,867,876/212,821,930.40 - Step 6: Final answer
x = 146,685,948.45
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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.