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Finding the Fourth Proportional to 111,424.87, 153,768.41 and 68,382.79

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Solution

The fourth proportional to 111,424.87, 153,768.41 and 68,382.79 is: 94,369.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,424.87 : 153,768.41 = 68,382.79 : x
  2. Step 2: Convert to fraction form
    111,424.87/153,768.41 = 68,382.79/x
  3. Step 3: Cross multiply
    111,424.87x = 153,768.41 × 68,382.79
  4. Step 4: Simplify right side
    111,424.87x = 10,515,112,889.66
  5. Step 5: Solve for x
    x = 10,515,112,889.66/111,424.87
  6. Step 6: Final answer
    x = 94,369.53

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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.