Finding the Fourth Proportional to 138,486,305.84, 191,092,388.28 and 78,955,283.12
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Solution
The fourth proportional to 138,486,305.84, 191,092,388.28 and 78,955,283.12 is: 108,947,621.41
Step by Step Solution
- Step 1: Write the proportion equation
138,486,305.84 : 191,092,388.28 = 78,955,283.12 : x - Step 2: Convert to fraction form
138,486,305.84/191,092,388.28 = 78,955,283.12/x - Step 3: Cross multiply
138,486,305.84x = 191,092,388.28 × 78,955,283.12 - Step 4: Simplify right side
138,486,305.84x = 15,087,753,618,724,370 - Step 5: Solve for x
x = 15,087,753,618,724,370/138,486,305.84 - Step 6: Final answer
x = 108,947,621.41
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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.