Finding the Fourth Proportional to 144,293,989.98, 199,128,257.09 and 78,216,682.76
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Solution
The fourth proportional to 144,293,989.98, 199,128,257.09 and 78,216,682.76 is: 107,940,404.97
Step by Step Solution
- Step 1: Write the proportion equation
144,293,989.98 : 199,128,257.09 = 78,216,682.76 : x - Step 2: Convert to fraction form
144,293,989.98/199,128,257.09 = 78,216,682.76/x - Step 3: Cross multiply
144,293,989.98x = 199,128,257.09 × 78,216,682.76 - Step 4: Simplify right side
144,293,989.98x = 15,575,151,713,453,150 - Step 5: Solve for x
x = 15,575,151,713,453,150/144,293,989.98 - Step 6: Final answer
x = 107,940,404.97
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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.