Finding the Fourth Proportional to 217,427,812.52, 299,936,038.66 and 129,259,101.92
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Solution
The fourth proportional to 217,427,812.52, 299,936,038.66 and 129,259,101.92 is: 178,309,584.87
Step by Step Solution
- Step 1: Write the proportion equation
217,427,812.52 : 299,936,038.66 = 129,259,101.92 : x - Step 2: Convert to fraction form
217,427,812.52/299,936,038.66 = 129,259,101.92/x - Step 3: Cross multiply
217,427,812.52x = 299,936,038.66 × 129,259,101.92 - Step 4: Simplify right side
217,427,812.52x = 38,769,462,988,811,176 - Step 5: Solve for x
x = 38,769,462,988,811,176/217,427,812.52 - Step 6: Final answer
x = 178,309,584.87
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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.