Finding the Fourth Proportional to 129,487,241.20, 194,230,861.80 and 118,905,660.40
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Solution
The fourth proportional to 129,487,241.20, 194,230,861.80 and 118,905,660.40 is: 178,358,490.60
Step by Step Solution
- Step 1: Write the proportion equation
129,487,241.20 : 194,230,861.80 = 118,905,660.40 : x - Step 2: Convert to fraction form
129,487,241.20/194,230,861.80 = 118,905,660.40/x - Step 3: Cross multiply
129,487,241.20x = 194,230,861.80 × 118,905,660.40 - Step 4: Simplify right side
129,487,241.20x = 23,095,148,892,390,136 - Step 5: Solve for x
x = 23,095,148,892,390,136/129,487,241.20 - Step 6: Final answer
x = 178,358,490.60
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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.