Finding the Fourth Proportional to 128,009,068.74, 176,633,511.73 and 77,747,131.97
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Solution
The fourth proportional to 128,009,068.74, 176,633,511.73 and 77,747,131.97 is: 107,279,500.44
Step by Step Solution
- Step 1: Write the proportion equation
128,009,068.74 : 176,633,511.73 = 77,747,131.97 : x - Step 2: Convert to fraction form
128,009,068.74/176,633,511.73 = 77,747,131.97/x - Step 3: Cross multiply
128,009,068.74x = 176,633,511.73 × 77,747,131.97 - Step 4: Simplify right side
128,009,068.74x = 13,732,748,945,913,686 - Step 5: Solve for x
x = 13,732,748,945,913,686/128,009,068.74 - Step 6: Final answer
x = 107,279,500.44
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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.