Finding the Fourth Proportional to 157,171,138.57, 216,779,979.81 and 115,341,072.94
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Solution
The fourth proportional to 157,171,138.57, 216,779,979.81 and 115,341,072.94 is: 159,085,412.82
Step by Step Solution
- Step 1: Write the proportion equation
157,171,138.57 : 216,779,979.81 = 115,341,072.94 : x - Step 2: Convert to fraction form
157,171,138.57/216,779,979.81 = 115,341,072.94/x - Step 3: Cross multiply
157,171,138.57x = 216,779,979.81 × 115,341,072.94 - Step 4: Simplify right side
157,171,138.57x = 25,003,635,463,196,936 - Step 5: Solve for x
x = 25,003,635,463,196,936/157,171,138.57 - Step 6: Final answer
x = 159,085,412.82
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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.