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Finding the Fourth Proportional to 235,865.28, 325,494.19 and 128,435.28

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Solution

The fourth proportional to 235,865.28, 325,494.19 and 128,435.28 is: 177,240.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,865.28 : 325,494.19 = 128,435.28 : x
  2. Step 2: Convert to fraction form
    235,865.28/325,494.19 = 128,435.28/x
  3. Step 3: Cross multiply
    235,865.28x = 325,494.19 × 128,435.28
  4. Step 4: Simplify right side
    235,865.28x = 41,804,937,431.02
  5. Step 5: Solve for x
    x = 41,804,937,431.02/235,865.28
  6. Step 6: Final answer
    x = 177,240.74

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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.