Finding the Fourth Proportional to 128,957,672.70, 193,436,509.05 and 99,732,354.30
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Solution
The fourth proportional to 128,957,672.70, 193,436,509.05 and 99,732,354.30 is: 149,598,531.45
Step by Step Solution
- Step 1: Write the proportion equation
128,957,672.70 : 193,436,509.05 = 99,732,354.30 : x - Step 2: Convert to fraction form
128,957,672.70/193,436,509.05 = 99,732,354.30/x - Step 3: Cross multiply
128,957,672.70x = 193,436,509.05 × 99,732,354.30 - Step 4: Simplify right side
128,957,672.70x = 19,291,878,455,129,756 - Step 5: Solve for x
x = 19,291,878,455,129,756/128,957,672.70 - Step 6: Final answer
x = 149,598,531.45
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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.