Finding the Fourth Proportional to 138,724,675.20, 191,439,985.11 and 82,970,094.63
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Solution
The fourth proportional to 138,724,675.20, 191,439,985.11 and 82,970,094.63 is: 114,498,690.72
Step by Step Solution
- Step 1: Write the proportion equation
138,724,675.20 : 191,439,985.11 = 82,970,094.63 : x - Step 2: Convert to fraction form
138,724,675.20/191,439,985.11 = 82,970,094.63/x - Step 3: Cross multiply
138,724,675.20x = 191,439,985.11 × 82,970,094.63 - Step 4: Simplify right side
138,724,675.20x = 15,883,793,680,542,492 - Step 5: Solve for x
x = 15,883,793,680,542,492/138,724,675.20 - Step 6: Final answer
x = 114,498,690.72
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.