Finding the Fourth Proportional to 77,434.99, 115,374.09 and 72,342.88
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Solution
The fourth proportional to 77,434.99, 115,374.09 and 72,342.88 is: 107,787.11
Step by Step Solution
- Step 1: Write the proportion equation
77,434.99 : 115,374.09 = 72,342.88 : x - Step 2: Convert to fraction form
77,434.99/115,374.09 = 72,342.88/x - Step 3: Cross multiply
77,434.99x = 115,374.09 × 72,342.88 - Step 4: Simplify right side
77,434.99x = 8,346,493,947.98 - Step 5: Solve for x
x = 8,346,493,947.98/77,434.99 - Step 6: Final answer
x = 107,787.11
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.