Finding the Fourth Proportional to 128,315,257.80, 192,472,886.70 and 77,296,921.80
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Solution
The fourth proportional to 128,315,257.80, 192,472,886.70 and 77,296,921.80 is: 115,945,382.70
Step by Step Solution
- Step 1: Write the proportion equation
128,315,257.80 : 192,472,886.70 = 77,296,921.80 : x - Step 2: Convert to fraction form
128,315,257.80/192,472,886.70 = 77,296,921.80/x - Step 3: Cross multiply
128,315,257.80x = 192,472,886.70 × 77,296,921.80 - Step 4: Simplify right side
128,315,257.80x = 14,877,561,671,870,158 - Step 5: Solve for x
x = 14,877,561,671,870,158/128,315,257.80 - Step 6: Final answer
x = 115,945,382.70
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1.5x scale
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.