Finding the Fourth Proportional to 128,394,457.72, 192,623,056.58 and 40,955,989.86
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Solution
The fourth proportional to 128,394,457.72, 192,623,056.58 and 40,955,989.86 is: 61,443,991.37
Step by Step Solution
- Step 1: Write the proportion equation
128,394,457.72 : 192,623,056.58 = 40,955,989.86 : x - Step 2: Convert to fraction form
128,394,457.72/192,623,056.58 = 40,955,989.86/x - Step 3: Cross multiply
128,394,457.72x = 192,623,056.58 × 40,955,989.86 - Step 4: Simplify right side
128,394,457.72x = 7,889,067,952,092,687 - Step 5: Solve for x
x = 7,889,067,952,092,687/128,394,457.72 - Step 6: Final answer
x = 61,443,991.37
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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.