Finding the Fourth Proportional to 129,924,561.78, 193,740,339.47 and 128,758,278.42
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Solution
The fourth proportional to 129,924,561.78, 193,740,339.47 and 128,758,278.42 is: 192,001,206.15
Step by Step Solution
- Step 1: Write the proportion equation
129,924,561.78 : 193,740,339.47 = 128,758,278.42 : x - Step 2: Convert to fraction form
129,924,561.78/193,740,339.47 = 128,758,278.42/x - Step 3: Cross multiply
129,924,561.78x = 193,740,339.47 × 128,758,278.42 - Step 4: Simplify right side
129,924,561.78x = 24,945,672,570,019,784 - Step 5: Solve for x
x = 24,945,672,570,019,784/129,924,561.78 - Step 6: Final answer
x = 192,001,206.15
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.