Finding the Fourth Proportional to 100,307,400.27, 138,439,342.99 and 61,171,877.70
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Solution
The fourth proportional to 100,307,400.27, 138,439,342.99 and 61,171,877.70 is: 84,426,418.55
Step by Step Solution
- Step 1: Write the proportion equation
100,307,400.27 : 138,439,342.99 = 61,171,877.70 : x - Step 2: Convert to fraction form
100,307,400.27/138,439,342.99 = 61,171,877.70/x - Step 3: Cross multiply
100,307,400.27x = 138,439,342.99 × 61,171,877.70 - Step 4: Simplify right side
100,307,400.27x = 8,468,594,558,329,098 - Step 5: Solve for x
x = 8,468,594,558,329,098/100,307,400.27 - Step 6: Final answer
x = 84,426,418.55
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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.