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Finding the Fourth Proportional to 124,640.80, 186,961.20 and 50,768.80

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Solution

The fourth proportional to 124,640.80, 186,961.20 and 50,768.80 is: 76,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,640.80 : 186,961.20 = 50,768.80 : x
  2. Step 2: Convert to fraction form
    124,640.80/186,961.20 = 50,768.80/x
  3. Step 3: Cross multiply
    124,640.80x = 186,961.20 × 50,768.80
  4. Step 4: Simplify right side
    124,640.80x = 9,491,795,770.56
  5. Step 5: Solve for x
    x = 9,491,795,770.56/124,640.80
  6. Step 6: Final answer
    x = 76,153.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.