Finding the Fourth Proportional to 136,947.84, 188,985.76 and 76,519.36
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Solution
The fourth proportional to 136,947.84, 188,985.76 and 76,519.36 is: 105,595.45
Step by Step Solution
- Step 1: Write the proportion equation
136,947.84 : 188,985.76 = 76,519.36 : x - Step 2: Convert to fraction form
136,947.84/188,985.76 = 76,519.36/x - Step 3: Cross multiply
136,947.84x = 188,985.76 × 76,519.36 - Step 4: Simplify right side
136,947.84x = 14,461,069,404.31 - Step 5: Solve for x
x = 14,461,069,404.31/136,947.84 - Step 6: Final answer
x = 105,595.45
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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.