Finding the Fourth Proportional to 129,697,917.08, 178,965,449.06 and 77,475,867.21
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Solution
The fourth proportional to 129,697,917.08, 178,965,449.06 and 77,475,867.21 is: 106,906,137.58
Step by Step Solution
- Step 1: Write the proportion equation
129,697,917.08 : 178,965,449.06 = 77,475,867.21 : x - Step 2: Convert to fraction form
129,697,917.08/178,965,449.06 = 77,475,867.21/x - Step 3: Cross multiply
129,697,917.08x = 178,965,449.06 × 77,475,867.21 - Step 4: Simplify right side
129,697,917.08x = 13,865,503,366,163,200 - Step 5: Solve for x
x = 13,865,503,366,163,200/129,697,917.08 - Step 6: Final answer
x = 106,906,137.58
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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.