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Finding the Fourth Proportional to 235,629.76, 325,163.28 and 128,200

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Solution

The fourth proportional to 235,629.76, 325,163.28 and 128,200 is: 176,912.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,629.76 : 325,163.28 = 128,200 : x
  2. Step 2: Convert to fraction form
    235,629.76/325,163.28 = 128,200/x
  3. Step 3: Cross multiply
    235,629.76x = 325,163.28 × 128,200
  4. Step 4: Simplify right side
    235,629.76x = 41,685,932,496
  5. Step 5: Solve for x
    x = 41,685,932,496/235,629.76
  6. Step 6: Final answer
    x = 176,912.85

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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.